How to read hole callouts



001 mm +25 0 0. 250 0. When the element to be measured in the center of a circle (point), the axis of a hole or axis on a thin-walled workpiece, the measured axis can be regarded as a point, and their coaxiality to the datum is called concentricity. Included are Thru holes, counterbores and  5 ก. Dash I used my ruler to make the lines on the protractor extend onto the transparent tape, then cut out a hole in the center of the protractor to allow me to line the tool up properly. Hole Sizes for Cut Tapping These charts are supplied as a recommendation only. In this case, it was necessary to specify the holes separately so that Datum C was properly defined. You can see that the document properties say the angle should be 2 dp, but it is showing 3. 2008 I am setting up the . Example: A hole is specified as: ø30 H7 Nominal Sizes Tolerance Tolerance Tolerance Tolerance Tolerance Tolerance Over To H11 c11 H9 d10 H9 e9 H8 f7 H7 g6 H7 h6 mm –– mm 3 0. Polar dimensions of a hole pattern. 31 ก. You can’t tell by the outlines whether it’s through, or you can see the bottom of the hole. Where I wrong ? Hole callout. These standards call for the expanded use of symbology in annotation. M6x1. The Hole Callout tool adds driven diameter dimensions to holes created by the Hole Wizard or circular cut features. Besides individual  Speaking of the combined callout, there is a question on the SOLIDWORKS MBD Forum asking how to change tolerance values in a combined Size Dimension . Linear dimensions fine. 2 Screws Fasteners pass through a clearance hole in one part, and are solidly located in the other part. 7-16 Intersections in Sectioning Note that if you only have threaded holes to callout, you can skip the drawing and use Fictiv’s Auto Thread Detection tool. This is the reason the hole callout count is 81 holes, not 46. Of course, if it is designed in mm and you build in mm, this is not an issue. That result should be less than or equal to 0. 2 Construction holes are assumed to be through as shown on the drawing, or to a cross hole if applicable. ” A cross-sectional view of how the features look is given as well. “Thru all” is added here to remove the requirement for a section view to show hole depth. Tubing OD/OD concentricity requirements can be indicated on a drawing in several different ways, including: GD&T concentricity symbol, which is a circle within a circle; Eccentricity percentage; TIR (Total Indicator Reading) Written statements such as “OD and ID must be concentric within 0. The midpoint of the two points on either side must lie within the tolerance zone set around the central plane. Common supplementary symbols used with groove welds are the melt-thru and backing bar symbols. GetLineSpaceFactor: Gets the line space factor, which defines the vertical space between parameters. You can always further refine a control with profile if you need to more specifically control something. Hole  9 mar. For example, based on the letter used, H7/h6 is a tolerance range for the hole (H7) and shaft (h6), respectively. 150 Chapter 10 Figure 10-1 AWS Standard Locations of the Elements of a Welding Symbol (AWS A2. The recommended way to define a thread though is by using a callout, as callouts add clarity to the drawing and allow the specification of pilot holes and threads with different length. The cross section of a punched hole is shown below. Mechanical Engineering solution — 8 libraries are available with 602 commonly used mechanical drawing symbols in Mechanical Engineering Solution, including libraries called Bearings with 59 elements of roller and ball bearings, shafts, gears, hooks, springs, spindles and keys; Dimensioning and Tolerancing with 45 elements; Fluid Power Equipment containing 113 elements of motors, pumps, air The units of measure used when defining a bolt circle hole list must all be of the same type, for example: all in inches or all in millimetres. 0 Shaft F 66 upper deviation -0. Gauge Ø (pin gauge)=Min Ø of hole (MMC)-True Position Tolerance For more detail on how bonus tolerances play into these callouts, see our sections on  6 ก. 5 (coarse) thread has a 1. Callout tools in AutoCAD Architecture The default tool palettes in the workspace contain sample callout tools that you can use and producing the hole. 001 mm Also check out our How to Read Blueprints tutorial. I am trying to read drawing dimensions to a table. Broach I modify the hole callout in solidworks how to read a thread callout 12 9000 level 3 doc no rev m ds 703 page hole callouts supported in advanced gd t ed tolerance Customizing The Solidworks Hole Callout GoerHole CalloutAdding Hole Callouts In A 2020 Solidworks HelpHole Callout Threaded Holes Thru DepthTechnical S Dimensioning General […] Technical Drawings Dimensioning,Geometric Dimensioning and Tolerancing,General Dimensioning and Tolerancing,Coordinate Dimensioning,Ordinate Dimensioning,Bolt Holes Dimensioning,Hole Callouts,Threaded Hole Callout,General Dimensioning and Tolerancing,GD&T,ISO,ANSI,Coban Engineering, We call out the threaded hole feature end-item requirement e. Blueprint Symbols Diagram. • Example 2: a hole in a part whose diameter is 1. 0 Shaft F 32 upper deviation +0. These numbers specify the width and height for the door and window. 5-1994 so everyone reading the drawing knows where to find the meaning. To optimally control and communicate these variations, engineers and manufacturers use a symbolic language called GD&T, short for Geometric Dimensioning and Tolerancing. Included are Thru holes, counterbores and countersinks. If the nth hole feature parameter of feature type is a line break and it can be deleted, deletes it. Drag to place the callout. AutoCAD Architecture provides a number of predefined callout tools for the various view types. And our Make Your Own Blueprint tutorial for those wanting to do their own blue print drafting. This will orient you to the property’s actual location on the ground. ISO Oriented and ASME Inlined styles have no kink. The map’s scale tells you how detailed your map is. Muchos ejemplos de oraciones traducidas contienen “hole callout” – Diccionario español-inglés y buscador de traducciones en español. The datum in the callout is (theoretically) perpendicular to all 3 holes. . When a hole requires that a depth be specified, the depth shall be incorpo-rated into the hole callout. For example, for a hole punch with a one-inch diameter, each end of the second hole is 1/2 inch from the center. Hole taper – When a hole is punched it does not have a constant radius through the entire thickness of the part. Both symbols indicate that complete joint penetration is to be made with a single-sided groove weld. Click on another hole. The addition of automatic hole callouts for Advanced Holes adds even more value to the command, shaving down design and documentation time even further and allowing designers to focus on what really matters. Next, find the survey legend. Dash Hole callout and countersunk hole issues | MySolidWorks. 237: Thickness of Shape Standard AISC Call Out: 4” Std Pipe or Pipe 4 Std 4”: Nominal Inside Diameter Std: Standard Weight, also make XS (Extra Strong) and XXS (Extra-Extra Strong) but these are not commonly used Plans, sections, elevations, and details are typically referenced to a callout. Dimensions. Figure 6. Leader lines for hole call outs in a chapter 6 thre and fasteners solidworks hole wizard and toolbox how to read a thread callout 12 chapter 6 thre and fasteners Hole CalloutHole CalloutHow To Read A Thread Callout 12 S With PicturesHow To Read A Thread Callout 12 S With PicturesAdding Hole Callouts In A […] In this video we explore some of the more common hole features and their drawing callouts. With the Cut Feature after the Hole Wizard Feature, the material is removed but the points in the Hole Wizard Feature remain. 3 (although the MMC modifier means that there may be bonus tolerance which allows for more than 0. However, as mentioned, this method The hole callout note uses the number of points that are in the sketch. Broach Technical Drawings Dimensioning,Geometric Dimensioning and Tolerancing,General Dimensioning and Tolerancing,Coordinate Dimensioning,Ordinate Dimensioning,Bolt Holes Dimensioning,Hole Callouts,Threaded Hole Callout,General Dimensioning and Tolerancing,GD&T,ISO,ANSI,Coban Engineering, The Datum callouts start with the third box and continue until there are no more Datums to reference. For example, an M10x1. See full list on wikihow. Map Scales. Figure 2. 062 HOLE CALLOUTS. 000” ± . 5 -- Say "Four-forty by point five" or "Number four-forty by a half. its easier to fit in the counterpart (comparable to a cone) A countersunk hole is a cone-shaped recess in an object, designed to accommodate a flat-head screw such that the head of the screw is flush with the surface of the part. The language that is used in manufacturing is not a spoken language, but a language of lines, numbers, symbols and illustrations. 2011 I would like Pro/E to use the proper callout style for hole types. Creating a hole callout: Click . Fifteen minutes later, I had the homemade protractor shown below. 25mm pitch. ToArray() method. 5X = means there are five holes that must meet this requiremnt. Countersink- To recess a hole with a  This video will show you how to Jul 25, 2019 · Ansi Standard Threaded Hole Callout A Pictures Of 2018. Counterbore, Spotface, and Countersink 3. These drawing standards are set by groups such as American Society of Mechanical Engineers or American National Standards Institute to serve as guidelines for engineers or To read a plat, first locate the North arrow. Dec 23, 2019 · Add hole callouts to section view and cosmetic threads. for fasteners, and hole callouts (local notes). Stay informed. Figure 3 – Advanced Hole Callout Customization Options (Drawing Environment) Figure 4 – Completed Advanced Hole Callout. The workaround I've found Loudly call out your first name when you get this far along. 000: Outside Diameter 0. However, dimensions that made with "hole callout" have more than one entity in the array. 9 is 1" = 1" Read as 1 inch (on the drawing) equals 1 inch (on the actual component or system). Hole callouts in SOLIDWORKS drawings. This will be relevant when we use the hole callout at drawing level. txt is the default file which SolidWorks uses to determine how to form threaded hole callouts created with the Hole Wizard. When I attempt to change the significant figures on the cs countersink angle, it also changes the dp on the diameters. Open in SOLIDWORKS User Forum to read and respond to complete thread. NOTE: Normally, holes such as these would be specified as 2x (2 Places) rather than noted twice. View attachment UNEF. The chart below gives simple understanding of Hole Basis Limits and Shaft Basis Limits. For these particular parts, the surface finish exceeded the roughness callout and the recommended roughness for proper air gage measurement. Step 5. It is a simple call-out on the print, as you only need to check the size and angle of the chamfer. •When the circular view of the hole has two or more concentric circles as for counter bored, countersunk or tapped holes, the arrowhead should touch the outer circle. If he goes away, fill your backside gap. It is the language of through; it will no longer be specified on a drawing that the hole is “THRU”. Note: All the doors and windows shown below are marked with numbers such as "3068". •The leader should point to the circular view of the hole, and only in the rectangular view when it improves clarity. For instance, proper counterbore hole calloutusing symbols. Understanding Inch & Metric Thread Callouts. See if you can read the all of the callouts in complete sentences. For example, a general hole will have three dimensions in the array (HoleDimension 119341, RadiusDimension 160698, RadiusDimension 160672). Dash numbers Most fl uid pipe and tube sizes in the United States are identifi ed by dash numbers, abbreviations that make ordering components easier. Notice that Datum A references a plane that is perpendicular to the hole’s axis. Our callout consisted of 5 elements, hence why we see 5 entries that we can customise. When an object is made of a combination of materials, a variety of section lining symbols makes materials identification easier. For example, the first (left) callout says, “Drill a 10 mm diameter hole through this location, then counterbore the hole at a 20 mm diameter down 8 mm. If you have a large amount of tolerance, you can check it with a depth micrometer. 250-28 UNF - 2A, . 3/8" = 1' Read as 3/8 inch (on the drawing) equals 1 foot (on the actual component or system). 086 inch) with 56 threads per inch, manufactured, dimensioned and checked according to Unified National Fine Standard and this is a normal external thread. D. The depth of the blind hole in Fig. The symmetry callout establishes a central plane around which the two parts of the feature are placed at equal distance. When datum references are repeated in the second segment of a composite or single segment control, the meaning is different. my bolt circle and/or # of holes the callout will automatically update If you read my previous thread do the same thing except use the The tapped hole callout format is: Ø tap drill diameter + depth; thread specification + depth; quantity of holes desired (not included if only one hole is  27 ส. This code will also allow engineers to identify the upper and lower size limit of the hole and shaft. 250 THRU 0. 187 THRU -0. 2563 Quite honestly most GD&T, drafting trainers and consultants as well as industry practitioners seem to have forgotten to have read and fully  Dimensioning,Bolt Holes Dimensioning,Hole Callouts,Threaded Hole Callout,General Dimensioning and Tolerancing,GD&T,ISO,ANSI,Coban Engineering, Oct 21, 2020 · I read the thread: thread1103-152443: spotface It dealed with the A Hole Callout is inserted and the Dimension PropertyManager appears. OD/ID Concentricity Callouts. Close and reopen NX, but the new callout dimension are M8 x 1. 024, lower deviation -0. 2563 Or read about some of the great services and solutions we offer. com Hole Callouts. 00X inches” Manufactured items differ in size and dimensions from the original CAD model due to variations in the manufacturing processes. Also, hole or feature dimensions are very critical. The chamfer is not given in the drawing, but it is a common practice to camfer the end of a threaded hole for 2 reasons 1. Back to Tips and Tricks. or. Next, measure the longest bolt hole spacing from center to center or measure the fl ange head diameter. Consider the position callout above that is tagged in the left/right direction of the hole: The position calculation would simply be 2*|X Actual-X True|. Actual sizes may vary depending on application and the material being tapped. 995” Aircraft Drawing and Blueprint Reading Hole callouts are the same in GD&T and TD&T. 3 50 0. Standard AISC Call Out: HSS4. Dimensions often come from part features as well. 237 HSS: Hollow Structural Shape 4. Of course, if we right click on this callout, we can also choose to break this combined dimension into individual instance callouts as illustrated in the first part of this guide. 12. Knowing how to cut, strip, and connect wire is an important electronics skill. 625x82 0. The table at right shows the current standard symbols I am trying to read drawing dimensions to a table. The symmetry callout is not very common. a decreased possibility of getting hurt due to sharp edges - especially at the end of the turn of the thread 2. 5 x 10 -- Say "Em three by point five by ten. small hole from the center; the other gives the distances between the small holes. 001 mm +60 0 0. Die clearance is the difference between the punch diameter and die diameter. This is where you want a RB key. You will see symbols indicating where pins from prior surveys were found (existing pin), where pins were placed by the surveyor who prepared the survey (pin placed), monuments, easements, structures smaller hole in fig. Arrow pointing to threaded hole feature with 3/8 - 16 UNC -2B. This can also be stated as FULL SIZE in the scale block of the drawing. So, after reading the above paragraph, you should know that: 2-56 UNF 2A means it is a #2 thread (sometimes called also 0. Counterbore- enlarging the end of a drill hole to a specific diameter and depth in order to recess a mating part. Figure (c) shows another example of coordinate dimensioning. The latest CAD design, industry  In this video we explore some of the more common hole features and their drawing callouts. I am using the hole callout on a countersunk hole. ค. Holes should be dimensioned on the view showing the circle outline. 2564 boss or the major (outer) diameter of a thread on a hole and can include a hole callout in drawings. If you have followed directions carefully to this point, call out, “I have. Divide the diameter of the hole punch by two and mark each side of the center of the second hole. png  file and replaced the Callout to read "CALLOUT". You can add multiple leaders to more holes, as long as the holes are the same size: Right-click the callout and select Add leader. Learn how to create hole callouts that will automatically insert useful information in SOLIDWORKS Drawings. 2561 In this callout, there is a diameter symbol, a dimension and the wording THRU He is saying that the note shoud read HOLE not THRU ALL. This file establishes the rules to show both the nominal drill diameter and the thread detail in a leadered note. Tip #2: Communicate hole tapping needs with thread size and depth Thread depth is hard to measure exactly; therefore, the depth call-out is always treated as a minimum. caliper are necessary to make accurate measure- Notice that the square hole in the object has no section lining, since it was not changed by sectioning. Callout tools in AutoCAD Architecture The default tool palettes in the workspace contain sample callout tools that you can use and Ø 5 means the hole diameter (drill size) is 5mm. This question hasn't been solved yet. Hole And Shaft Basis Limits And Fits . Of course, if you want to use this new symbol, you should reference ASME Y14. 021, lower deviation 0. Hole callouts are available in drawings. Find T H, T s, Allowance, C max, I max, and what kind of fit it is ? Hole F 32 upper deviation +0. / O. HOLE C 2 D HOLE C Nominal Position Figure 1: Bolted Connection { worst case D HOLE C 4 D SCREW C Nominal Position Figure 2: Screwed Connection { worst case Maximum allowable shift of holes for bolting: B = C 2 (1) 2. For example, I have a print that has a single position callout applied to 3 holes. 5mm pitch, while an M10x1. We will also look at a way to troubleshoot hole c To read aloud, say these callouts as follows: #4-40 x . In such cases the curves of intersection, or ellipses, appear as straight lines, as shown. zip I had some issues copying the text, but I this file has DEFAULT_CALLOUT_FORMAT_DATA options that work, so I finally got the formatting right. However, as mentioned, this method 2. The symbol's perpendicular line is always drawn on the left side, regardless of the orientation of the weld itself. 3). The depth of through holes is not specified on a drawing however, the depth of a blind hole must be specified either by the depth symbol or directly by the size. Higher tolerance (ISO 3) generates a rough fit with a  This is the reason the hole callout count is 81 holes, not 46. 237: Thickness of Shape Standard AISC Call Out: 4” Std Pipe or Pipe 4 Std 4”: Nominal Inside Diameter Std: Standard Weight, also make XS (Extra Strong) and XXS (Extra-Extra Strong) but these are not commonly used producing the hole. 050 2. It is a graphic language that is drawn and read rather than spoken and heard. " This guide is for machine screws. In SOLIDWORKs 2018, Hole Callouts can be created for Advanced Holes in much the same way as creating a Hole Callout for a Hole Wizard Hole. In this case, the first operation should define the dimensions of the pilot hole (the appropriate diameter can be found in standard tables), and the second Guru's, Is there a consensus on whether to include or exclude the tap drill size and depth on standard threaded hole callouts? My thought is that it's better to call out since it's relatively easy to do in Pro/E, and it provides a definitive drill depth so that the model will match the actual machi It sounds like the position is a refinement of the profile callout – meaning the surface of your hole is controlled with the profile callout, and then the true position further refines the actual position of the hole center. 2 วันที่ผ่านมา How to use SOLIDWORKS hole wizzard and thread feature to make internal threads · 03-13-2021 11:09 AM. It has very limited uses and is also difficult to inspect. Hole Callout What's New in NX 9 CAD Product and Manufacturing Information (PMI) Usability enhancements Rapid Dimension Linear Dimension Radial dimension  I've not used Hole Callouts that much, as I've not yet figured out how to customise the file that determines the format of the annotation. We convert the drill size given in the drill files or tool lists into milimeters and round to the nearest 0. ” On the reverse side of this paper, add 8950 and 9305. Fix the model. Hole basis limits and fits with Shaft basis limits and fits have been given as an example in the chart below. 2559 Tips and Tricks for Dimensioning and Managing Hole Callouts with MBD and coordinate measuring machines (CMM) can read 3D CAD models  15 ต. Put a circle around your answer and put a square around the circle. Punch three small holes in the top of this paper with your pencil point. This article is very helpful regarding the single datum position callout on a single hole, but I am still confused as to how it works if the callout applies to multiple holes. How to Use a Breadboard - Now that you know how to read schematics, why not make one! Breadboards are a great way to make temporary, functional, prototype circuits. Sealed Source & Device Workshop Blueprint Reading: 20 Default units, dimensions, or tolerances Instructions for fabrication processes Standard AISC Call Out: HSS4. Best results are obtained by creating holes using the Hole Wizard. 437 1. PCB drill tools are manufactured in increments of 0. Adding DEFAULT_CALLOUT_FORMAT_DATA to the . Note that the larger hole K is the same diameter as the vertical hole. Sealed Source & Device Workshop Blueprint Reading: 20 Default units, dimensions, or tolerances Instructions for fabrication processes Step 5. Fig. Annotation standardization is provided by the ASME Y14 series of standards. In order to make this callout work it is  250 THRU V 0. 5X . Select a circle that is part of a hole feature. How to Identify Fluid Ports and Connectors E-SROV-TS009-E1 March 2013 5 A seat angle gauge, thread pitch gauge and an I. A 1:24000 scale, for example, means one inch on the map equals 24,000 inches of real-world terrain. The three small holes are On a bolt circle whose diameter is given for reference purposes only. This is the most common method for threaded hole callouts. If the scale ratio had a number like 1:65,000, though, that would mean that each inch on the map covered 65,000 inches of terrain. 41-2003 as well as ASME Y14. Tool lists for drill files are ALWAYS read ( and interpreted) by our CAM systems as finished hole sizes ( so final diameter of the whole after plating and surface finish ) 2. 2563 ISO Referencing and ASME Referencing styles have kinks. Blueprint Reading Fundamentals Specification and Callouts for Machine Processes 1. I used workPart. You can also place a callout that is not referenced to a view, and reference it later. If you change a hole dimension in the model, the callout updates automatically. "3068" for a door If the surface is too extreme, the air gage will read a diameter that is a little larger than the peaks, thus making the part measure larger than it actually is. 4:2012, Figure 3 reproduced and adapted with permission from the American Welding Society (AWS), Miami, FL. A code with an upper-case letter is for the hole, while that of a lower-case letter is for the shaft. The definitions for descriptions given in the chart explained as follows. 05 mm. (d). This is standard practice and this Datum reference controls the direction of the hole through the material, usually perpendicular. 0 - 6H is the thread and tolerance to be tapped into the drilled hole - again, through all. Another Composite Tolerancing Tip. 5 Callout examples . 500 MIN FULL THREAD. This file establishes  25 ago. Simply speaking, it is the coincidence degree of the centers of two circles. HOL file will allow the user to set specific callouts for different hole situations. 029, lower deviation +0. 500 7. Crane’s notes on defining datums using two holes) Ø 5 means the hole diameter (drill size) is 5mm. through; it will no longer be specified on a drawing that the hole is “THRU”. This is due to the international understandability of symbols. 016 3. For best practice, NEVER edit the Hole Callout Note. 086, as this is 0. The taper in the bottom side of the hole is relative to the die clearance. 1. Other thread and hole sizes are available upon request or on our website drill size calculator. Fantastic, I probably need to read  31 ธ. 001 mm-20 0 0. Repeat as necessary to add leaders to as many same-size holes as necessary. From the main center, the small holes are located in 2 mutually perpendicular directions. You need to read the play quickly and get into a gap fast before the offense gets another blocker in there to double-team you. The measured distance on the drawing is the actual distance or size of the component. Different kinds of section lining is used to identify different materials. 25. g. hol file and I am having a problem with trailing decimal places when I show the hole callout not on the drawing. " M3x. 25 (fine) thread has a 1. It should be noted that Advanced Holes created in  เคยมีปัญหาพื้นที่บน drawing จำกัดในการบอกขนาดกันบ้างมั้ยคะ ในหัวข้อนี้จะขอแนะนำวิธีการรวม Hole Callouts ของรูเจาะหลายๆรูไว้ใน callouts เดียว บนหน้าต่าง  Hole Callouts On Drawings! Hole Callouts On Drawings excel, tutorial excel, step by step excel, how to use excel to be a smart Excel User in no Time. On the drawing above, the red tolerance is located by the red dimensions. (see Dr. 001 mm-60-120 0. Working with Wire - Or, skip the breadboard and jump straight into wiring stuff up. Plans, sections, elevations, and details are typically referenced to a callout. Related Question Answers. They will usually come from the origin or the edge of the part. Read more. Metric thread callouts are fundamentally different because the thread pitch (distance between each thread, in mm) is specified instead of threads per inch or per mm. 0X0. 051, lower deviation 0. These could be screws in The symbol's perpendicular line is always drawn on the left side, regardless of the orientation of the weld itself. hole or shaft are applied 16 grades of tolerance, designated by numbers IT1 to IT16. GetLeaderAttachment: Gets the leader attachment, which decides where the leader is attached to the call out. 26 ก. Hole diameter: The diameter of the holes that are equally distributed around the bolt circle diameter Bolt circle diameter: If the surface is too extreme, the air gage will read a diameter that is a little larger than the peaks, thus making the part measure larger than it actually is. Ask an expert  Is it possible to edit the number of pieces in hole callouts? may not have access to, or know how to read if he did, a tap drill chart. 9 shows one through hole and one blind hole. 005” would have a maximum material condition of 0. 2561 You may already know how to create Callouts for Hole Wizard holes, but did you know SOLIDWORKS 2018 lets you automatically create Callouts  How to use Advanced Hole with Hole Callout tool Since these features are so complex, it is important that the callout is correct according to the designer and  Related Searches · Hole Callout - Onshape · Education · Engineering Design Representation · Education · Engineering Drawings: Dimensioning · Education · How to callout  In this article, we'll investigate how to add these annotations to an existing model. Before you start, remember to label north and the scale on your paper. The tolerance in the upper segment of a composite tolerance is located by all applicable basic dimensions. Mar 21, 2016 · Step 5: Apply If you don't know it, read how to create new part file here. The hole callout note uses the number of points that are in the sketch. 21. พ. Calloutformat. Hole F 66 upper deviation +0. GetListOfFeatures: Gets the list of material callouts, assembly directions and other information must be clearly understood. Other threads, such as wood screws, follow slightly different guidelines. Drills and Reamers 2. First measure the port hole diameter using a caliper. " 1/4-20 x 5/8 -- Say "Quarter-twenty by five eighths. We call out the threaded hole feature end-item requirement e. 9 is Calloutformat.

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