7/32". Nominal: 48 - 49.1 Positional: 0.5. 2. 2. Shop for US Machine Screws. 6733. For instance, a 2-inch galvanized steel pipe has an inside diameter of about 2 1/8 inches and an outside diameter of about 2 5/8 inches. Product advisor tanks. 0.216". The standard (size) tolerances are divided into two categories: hole and shaft. 27. All units are in inches. ISO Shaft Tolerance limits is designated with lower case letter as shown in the chart and It is also described in previous pages. ANSI B17.1 Recommended uniform relationship between shaft diameter and key sizes for parallel and taper keys. Step 2: Shaft dimensions. Diameter is the nominal size of the screw, measured from the farthest points of the threads. : 0.03 inch x 45o, For 1.00 - 2.00 inch dia. Lots of rotory seals are also very direction sensitive, they . For example: H7 (hole, tapped hole, or nut) and h7 (shaft or bolt). It is neither equal to the inner diameter (ID) nor the outer diameter (OD) of the pipe. Each shaft should be tested with the same tip size, shape, height, hardness, and weight. With a tight fit, the bore of the inner ring of the bearing is slightly . It does not say whether it is the nominal diameter or the actual diameter. If it passes . Mean value of tip diameter. The nominal size may not match any dimension of the product, but within the domain of that product the nominal size may correspond to a large number of highly standardized dimensions and tolerances.. Nominal sizes may be well-standardized across an industry, or may be proprietary to . For example, a bolt and nut may be described as being ½" diameter. The common specification dimension, Keyway Size, is highlighted. shaft diameter shaft and bore requirements international 31 diameter (inches) up to 4.000 4.001 to 6.000 6.001 to 10.000 ± .003 ± .004 ± .005 tolerance shaft tolerance recommendation metal od bore surface finish recommendation surface finish conversion: micro-inch to micro-meter 4 8 10 16 20 English Standard Keyway and Key Sizes Shaft Diameter (in) Keyway (in)* Key (in) From To Width (W) This system leads to greater economy . 4. Bolt Thread Length. The shaft is made from AISI 1020 CD steel, and the gear is made from steel that has been through hardened to provide Also see Table of Hole Tolerances per. Bore Diameter: 0.2500 to 10 inch. For specialty applications, we also offer custom or modified shafts. Fits. Screw Thread Designations, Minor Diameter, Major Diameter, Pitch Diameter; ANSI/ ASME EXTERNAL Screw Thread Size Chart. . What should the minimum hole diameter in mm for at least 95% of the manufactured shafts to fit? Example fits: H8/f8, H9/f8, H7/f7 (all hole-basis), F8/h6, F8/h7 (all shaft-basis) Using a 25 mm diameter, a H8/f7 fit gives a minimum clearance of 0.020 mm and a max clearance of 0.074 mm. You can then solve for d. From this maximum operating torque, we can find the shaft diameter with the above equation 2070.06 x 10 3 N-mm = (70Mpa (N-mm 2) x π x d 3 )16 d 3 = 150687.075 mm d = 53.19 mm The required shaft diameter will be a 53 mm shaft Here is an online calculator that Helps you Calculate the shaft diameter. 6733. The gear has a hub, with an outside diameter of 60 mm, and an overall length of 50 mm. Question: A shaft is to be manufactured with a nominal diameter of 52mm and a tolerance of ±0.05mm. Measurement. The following table shows recommended shaft and housing sizes and tolerances for different applications. Table of Metric Shaft Tolerances per. Seat/mating-ring carrier has a limited press-fit range. For example, a 2-inch nominal steel pipe consists of a family of steel pipe with a 2.375″ diameter. Example: Nominal Size 3mm-6mm; -270μm= -270(10-3)=-0.270mm Example: .8750inch shaft which is the basic size for a 7/8 inch nominal shaft.25mm nominal size which can be basic size of 24.950mm. Denys Rositskyi added Nominal Shaft Diameter: 40 to "Configure Component" . 112 Parker Court Chardon, Ohio 44024; email us. Low speed, or spring preload. What is most nearly the minimum shaft diameter? . As the above poster says, its all done by nominal numbers. (B) or mounting bore I.D.. 3. Rectangular 7/16 1/8---3/64 1/16 3/32 Nominal Shaft Diameter Nominal Key Size . Shaft Diameter Width Height Depth Depth D W H T1 T2 over 6 to 8 2 2 1.2 1.0 over 8 to 10 3 3 1.8 1.4 . Although there are several types of machine screw designations in the Unified Screw Thread . The chart below provides information on machine screw sizes from size 000 to ½ inch diameter (past size 12, screws are called by their measurements in inches). In the case of the shaft. In actual practice, most threads are made with a smaller major diameter than the nominal size. Answer (1 of 4): Bore dia of bearing should be slightly greater than the shaft diameter. According to nominal size and fit type selection among running and sliding [RC], locational clearance [LC], locational transition [LT], locational interference [LN], force and shrink [FN] fits, size limits for hole/shaft are calculated with schematic representation of the fit. ANSI tolerance calculator is applicable to non-threaded cylindrical . Determine the nominal shaft size family. The fit and the centering accuracy are determined by the deviations of the space widths and thicknesses as well as by the tolerances achieved or specified. What is hole basis and shaft basis? The number "0.1mm" refers to 0.1 threads per millimeter. M e = 0.5 ( M + M 2 + T 2) When designing the shaft for the bending moment, we can apply the formula shown: M e = ( π ÷ 32) ∗ σ b ∗ d 3. ISO 286 Chart Calculator. Equals Shaft Bore Keyway Keyway Diameter Nominal Shaft Bore Keyway Keyway Diameter Diameter (Width x Depth) Radius Over to Including Diameter minus Tolerance (Width x Depth) Radius 1/2 .500 / .501 1/8 x 1/16 1/64 9/16 to 7/8 .001 +.0005 3/16 x 3/32 1/64 9/16 .5625 / .5635 7/8 to 1-1/4 .001 +.0005 1/4 x 1/8 1/64 a)-0.6 -1.2 b)2.2 0.6. If the maximum shear stress induced in both the shafts is same, the twisting moment T transmitted by hollow shaft must be reduced by Description: Stafford's full line of standard and custom, corrosion-resistant shaft collars and couplings is ideal for a wide range of on- and off-shore marine applications. A gear and shaft with nominal diameter of 35 mm are to A gear and shaft with nominal diameter of 35 mm are to be assembled with a medium drive fit, as specified in Table 7-9. Pipe also has a wall thickness which is referred to by its schedule. What should the minimum hole diameter in mm for at least 95% of the manufactured shafts to fit? The shaft is made from AISI 1020 CD steel, and the gear is made from steel that . FYI There will be negative clearance, the seals "hole" will be smaller than the shaft pre assembly. MMC shaft = largest shaft 4.1 + 0.9 = 5.0 cm. Pipes are identified by "nominal" or "trade" names that are loosely related to the actual dimensions. The standard metric rack screw is actually an M6 x 0.1mm. 3/16". The upper and lower deviations of the shaft are 0.005 cm and 0.003 cm, respectively. A solid steel shaft of 100 mm diameter and 1.0 m long is subjected to a twisting moment T. This shaft is to be replaced by a hollow shaft having outer and inner diameters as 100 mm and 50 mm respectively. The gear has a hub, with an outside diameter of 60 mm, and an overall length of 50 mm. You enter a basic diameter ( Fig 1; Dia) and select your desired fit from the calQlation options and Limits and Fits will automatically calculate the machining tolerances (maximum and minimum diameters) for both the Hole and the Shaft. : 0.06 inch x 45o Diameter Tolerance Nominal Shaft Diameter (inches) 1.500 2.000 0.500 0.625 Nominal Nominal Shaft Bore Dia. Shaft Diameter (mm) Keyway (mm) Key (mm)* From To Width (W) Depth (h) Width (W) Depth (T) 6 8 2 1.0 2 2 9 10 3 1.4 3 3 11 12 4 1.8 4 4 13 17 5 2.3 5 5 18 22 6 2.8 6 6 23 30 8 3.3 8 7 31 38 10 3.3 10 8 39 44 12 3.3 12 8 45 50 14 3.8 14 9 51 58 16 4.3 16 10 59 65 18 4.4 18 11 66 75 20 4.9 20 12 76 86 22 5.4 22 14 86 96 25 5.4 25 14 96 110 28 6.4 . The bore of the pipe is inside diameter of the pipe. A gear and shaft with nominal diameter of 35 mm are to be assembled with a medium drive fit, as specified in Table 7-9. and an overall length of 50 mm. It is assumed that bearings used are ABEC 5 tolerance (+0 -.0002 inch) for bore and O.D. ANSI tolerance calculator is applicable to non-threaded cylindrical . Example. Nominal tensile stress in round shaft with shoulder fillet with stress concentration is fhe amount of tensile stress at the minimum cross section in round shaft with shoulder fillet with stress concentration arising due to the forces acting parallel to the shaft axis and is represented as σ o = (4* L)/(pi *(d ^2)) or Nominal Stress = (4* Load)/(pi *(Smaller diameter of shaft with fillet ^2)). Example; 7/8 inch Shaft, 25mm Shaft etc. According to nominal size and fit type selection among running and sliding [RC], locational clearance [LC], locational transition [LT], locational interference [LN], force and shrink [FN] fits, size limits for hole/shaft are calculated with schematic representation of the fit. What is the MMC for a shaft with a nominal diameter of 4.1 +- 0.9 cm? Tip height can also have an effect on the amount of squirt (CB deflection) a shaft creates, especially if there is a heavy ferrule (e.g., brass) on the shaft. Non- standard application: Custom designs with varied tolerances, keyways and non- standard. Your .750 diameter shaft will likely never be exactly .750. perhaps a bit more, perhaps less, but seldom exactly on "nominal". Step 2: Shaft dimensions. The number "12" is a size designator with no numerical meaning. There is no allowance for class 3 threads, so the maximum major diameter is the nominal size. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. Shaft and hole matings come with a lot a different options and always require tolerances to obtain the right fit. The following Engineering calculator will show the plus and minus tolerance for the specific ISO 286 Shaft tolerance data. Nominal is what the engineer uses during the first phase of a design. minimum diameter. Enter your desired preferred tolerance grade and the nomial size. A screw thread has a number of dimensions required to assure proper function but is referred to by a nominal size and a thread design family, for example " 1⁄4 inch, 20 threads per inch, Unified National Coarse." In the United Kingdom, pipe is available that is quoted in both metric size and imperial size. Nominal torsional stress in round shaft with shoulder fillet with stress concentration is the amount of torsional stress in the material of the round shaft with shoulder fillet with stress concentration arising due to the forces acting such that to twist the round shaft is calculated using Nominal Stress = (16* Torsional Moment)/(pi *(Smaller diameter of shaft with fillet ^3)). So it is neither a clearance fit . Furthermore, what is screw size? You place two gears so their centers are separated by 2 inches nominal. Try it, it will be fun ( Torque Calculator) The given tolerance is expected to cover 68.26% of the manufactured shafts. Especially with dies, if you start with a .250" die you will soon be in trouble, too tight in the die. All sizes are in inch units. Shaft and hole matings come with a lot a different options and always require tolerances to obtain the right fit. In plumbing pipe size is referred to as nominal pipe size - NPS, or "Nominal Pipe Size". Note exact size of shaft (A) ± .001". You can identify an M6 screw by measuring the diameter with a ruler at slightly more than 7/32″ (0.228″). A line-to-line assembly is when the bore of the inner ring of the bearing and the outer diameter of the shaft are the same. It depends on the percentage of thread you want. ISO Shaft Tolerance limits is designated with lower case letter as shown in the chart and It is also described in previous pages. 28. Mean value of tip diameter. So, you may also see a measurement like 6-32 x 1 1/2". ISO 286 Where σ b = Ultimate/Allowable Stress. The diameter is a nominal measurement across the shaft and is manufactured to close tolerances as it mates with a matching component. Recommended tolerance is h6. The size most commonly associated with screw threads is the nominal diameter. As the above poster says, its all done by nominal numbers. Acceptability criteria are described in ANSI/ASME B1.3M-1992 (R2001). There can be more than one shaft size range for each can size. A gear and shaft with nominal diameter of 35 mm are to be assembled with a medium drive fit, as specified in Table 7-9. In the Shaft basis system, the shaft is kept as the constant, and hole upper and lower deviation values determine the type of fit. Screws have three basic measurements: gauge, threads per inch, and shaft length in inches. Some metric sizes are also carried. Measure the seal can size O.D. Fit tolerance: On the hub/ shaft connection 0.01 to 0.05 mm. Shaft size should have a tolerance if you search the seal manufacturers data sheets + Finish is also very important. To make a 1/4" bolt, you start with a rod at least .005" smaller than the nominal size, .250". Maximum 49.6 mm ( in this case is equal to the nominal value) Minimum . Mechanical Tolerance Chart Data. The metric . MecE 265 Engineering Graphics and CAD 8-3 8.7 Bases of fits There are two bases for a system of limits and fits that are determined from whether the one of the limit dimensions of the hole or shaft is the nominal dimension. The term nominal refers to pipe in non-specific terms and identifies the inside diameter with a non-dimensional number. The fit and the centering accuracy are determined by the deviations of the space widths and thicknesses as well as by the tolerances achieved or specified. For more information about how to measure diameter see our Measuring Fastener Diameter page. Coupling Length: 5.91 to 84.65 inch. 8.7.1 Hole bases In this system, the basic diameter of the hole is constant while the shaft size varies according to the type of fit. The given tolerance is expected to cover 68.26% of the manufactured shafts. They are labelled with a letter (capitals for holes and lowercase for shafts) and a number. The working height is related to can size and is the distance from the A shaft with an interference fit has a maximum diameter of 3 cm and a nominal diameter of 2.990 cm. our address. Nitrate (NO3) Nominal diameter (ND, Nominal Diameter) Nominal pressure Terms 1 to 3 from 3 Nominal diameter (ND, Nominal Diameter) Corresponds to the clear diameter of the pipe parts in mm (for example, DN 110), and forms the characterising feature of matching parts within a pipeline system. Shaft = 24.985/25.000 Oil seal shaft material, shaft tolerance, configuration of the bore, bore material and shaft eccentricity. . All about rainwater harvesting. 1. So 25.2 mm is acceptable for a 25 mm cut and so is 599.2 mm according to the standard for a 600 mm nominal value. Shaft Basic System: In shaft basic system, the size of the shaft is constant and different fits are obtained by varying the size of the hole, as shown in fig. Each hole and shaft designation carries a required tolerance range depending on the nominal size of the hole and/or shaft. Coupling Diameter: 1.26 to 4.02 inch. 49.52 mm. Lots of rotory seals are also very direction sensitive, they . 0.190". . 49.52 mm. Unified Screw Threads per. So 25.2 mm is acceptable for a 25 mm cut and so is 599.2 mm according to the standard for a 600 mm nominal value. the minimum shaft size is also smaller than the maximum size of the hole. Shaft size should have a tolerance if you search the seal manufacturers data sheets + Finish is also very important. A loose fit is when the bore of the inner ring is slightly larger than the outer shaft diameter. (A) 2.990 cm (B) 2.992 cm (C) 2.993 cm (D) 2.995 cm. The shaft is made from AISI 1020 CD steel, and the gear is made from steel that has been through . The shaft is made from AISI 1020 CD steel, and the gear is made from steel that . The gear has a hub, with an outside diameter of 2.5 in, and an overall length of 2 in. Mechanical Engineering Mechanical Engineering questions and answers A shaft is to be manufactured with a nominal diameter of 52mm and a tolerance of ±0.05mm. Bore Diameter: 0.1969 to 2.36 inch. What is a maximum/minimum shaft and hole size for a 1" RC6 Basic Hole System? But neither the external threads of the bolt nor the internal threads of the nut are exactly .500 in diameter. Maximum Metal Limit (MML) and Least or Minimum Metal Limit (LML) for a Shaft: The shaft shown in Fig. Substituting the numbers into the first equation M e equation and then equate both of the M e values. The gear has a hub, with an outside diameter of 60 mm, and an overall length of 50 mm. Thomson Standard Shafting can be special machined as per your specifications or cut to your specified length. A gear and shaft with nominal diameter of 1.5 in are to A gear and shaft with nominal diameter of 1.5 in are to be assembled with a medium drive fit, as specified in Table 7-9. ISO Shaft Tolerances help the manufacturer to machine the parts with specified limits given by engineer. Catalogue Rainwater harvesting solutions In the case of the shaft. If a different grade of bearing is used, this will affect recommended dimensions of mating components. The following table of hex bolt head dimensions was adapted from ASME B18.6.3, Table 29, "Dimensions of Plain (Unslotted) and Slotted Regular and Large Hex Head Screws." Recommended ANSI Standard Keys and Keyseats Design per. Unless otherwise specified, the shaft keyway is assumed to be standard. The outside of the pipe is always larger than the . BASIC SIZE : The size used when the nominal size is converted to the decimal and from which deviation are made to produce limit dimension. 1.58 (b). M6 screws are commonly used by HP. In CSA A23.3 - 2014, Design of concrete structures, the formula for compression deveopment and lap length of rebar is given in terms of d b.In the definition of symbols at the front of the Standard, it says d b = diameter of bar. What are the limits of clearance for this system? The fit (interference/clearance) should be selected based on the application. Nominal is a word that denotes non-specificity and in this case, identifies the approximate inner diameter with a non-dimensional number. 10 - 10 mm diameter SM - Metric diameter Shaft Type Shaft Straightness 1060 Steel or 440C Stainless steel (only with L & S tolerance) Surface Finish 8 - 12 R a microinch Shaft Chamfer For 0.25 - 0.75 inch dia. Nominal Shaft Diameter ( A ) Bottom of Keyway to Bottom of Shaft ( B ) Keyway Width ( C ) Reference Depth ( D ) fractional decimal . Our 12L14 nominal shafts are made from precision ground steel and are stocked in diameters of 1/32" to 1-1/4" and lengths from 3" to 48". Is the hole size the maximum diameter, minimum diameter, or nominal diameter when a piece of plastic that contains the hole is in its maximum material condition? Machining Tolerances Calculator - Technical Help. Nominal Diameter, d 6 1/2 7 1/2 9 Square Keys preferred for shaft diameters above this line: rectangular keys, below Key 3 3/4 4 1/2 5 1/2 Shaft Key Size Versus Shaft Diameter ANSI B17.1-1967 (R1998) 3/16 7/32 1/4 1 3/4 2 1/4 2 3/4 3 1/4 9/16 7/8 1 3/8 H/2 To (Incl.) Nominal torsional stress in round shaft with shoulder fillet with stress concentration is the amount of torsional stress in the material of the round shaft with shoulder fillet with stress concentration arising due to the forces acting such that to twist the round shaft is calculated using Nominal Stress = (16* Torsional Moment)/(pi *(Smaller diameter of shaft with fillet ^3)). This means it's a #6 diameter, with 32 threads per inch (almost double the normal thread count as a . Email Us [email protected] . H7/h6 is a very common standard tolerance which gives a tight fit. Steel has a shear strength (in single shear) of 44,000 psi; in double shear of 88,000 psi. Nominal Shaft Diameter: Tolerance: up to 4.000 +/- 0.003: over 4.000 to 6.000 +/- 0.004: #12. Parts will turn and slide quite freely. Nominal is the theoretical value, as compared with the actual value. Stafford Marine Service Collars and Couplings are machined from 303 and 316 stainless steel and brass; supplied with either. When entering your diameter, you must ensure that you have . In manufacturing, a nominal size or trade size is a size "in name only" used for identification. Pushing the heavy ferrule weight back from the CB (by using a taller tip, which is much less dense . For an example, a ¼"-20 2A thread has a theoretical major diameter of .250", with an allowance of .0011", making the top tolerance of the thread major diameter .2489". The given tolerance is expected to cover 68.26% of the manufactured shafts. Maximum 49.6 mm ( in this case is equal to the nominal value) Minimum . * Nominal thread diameter is measured on the outside of the threads per ASME B18.6.3. Fits. So it is neither a clearance fit . . Shaft surface finish should be better than 0.8 μm Ra (32 μin cla) except where PTFE wedge packings are used which require better than 0.4 μm R a (16 μin cla) and preferably a corrosion resistant surface . Sliding Fit Leaves a small clearance for high accuracy while maintaining ease of assembly. Per ASME B18.2.1, the nominal thread length of inch-series bolts can be found by: where L is the total bolt length and d nom is the nominal bolt diameter.. Hex Bolt Head Dimensions. A nominal hole/shaft size of 0.375" to be used in the loosest of running fits where wide commercial tolerances is required. In fact, the bolt diameter is a Length . These number fit classifications are the key that unlocks the design tolerances of the fit. FYI There will be negative clearance, the seals "hole" will be smaller than the shaft pre assembly. Shaft tolerances should be within ±0.05 mm (±0.002 in) and where PTFE wedge packings are used must be round within 0.01 mm (0.0005 in). Assuming a Hole has the below GD&T specification, what positional tolerance should it have if its measured diameter is 48.6? Find the recommended hole and shaft sizes and tolerances for a nominal hole/shaft size of 0.25" for a precision sliding fit at low speed where temperature remains relatively constant. Shaft Basis system. the minimum shaft size is also smaller than the maximum size of the hole. Nominal diameter (ND, Nominal Diameter) Corresponds to the clear diameter of the pipe parts in mm (for example, DN 110), and forms the characterising feature of matching parts within a pipeline system. Board SolidWorks ANSI/ASME B1.1-1989 (R2001), R2001) Nomenclature, are used. These two tolerance ranges, when taken together, completely characterize the fit and control the sizes of both the hole and shaft. Positional tolerance = actual - IB There are three main types of shaft and housing fits. Example: Nominal Size 3mm-6mm; -270μm= -270(10-3)=-0.270mm a Some key standards show 1-1/4 inches, preferred height is 1-1/2 inches. 45 degree chamfered ends and straight cut ends are available. A shaft with a clearance fit has a nominal diameter of 12 mm. The area in shear is the diameter of the shaft times the length of the shaft under stress. 1.59 has an upper and lower limit of 40.05 mm and 39.95 mm . Engineering; Mechanical Engineering; Mechanical Engineering questions and answers; 4.15b What is the nominal shear stress at the surface of a 2-in.-diameter solid steel shaft of a home-buit, high-speed boat that transmits 2500 hp at 2000 rpm, if bending and axial loads are negligible? Nominal diameter is a more of a label than a size. Nominal Diameter is also known as the mean or average outside diameter and is represented by DN. ISO Shaft Tolerances help the manufacturer to machine the parts with specified limits given by engineer. In the shaft basis system, the upper deviation of the shaft will be Zero. Recommended tolerance is h6. Example: Nominal Size of shaft 25mm. Contact us for a custom quote. Actions. B ) 2.992 cm ( B ) 2.992 cm ( B ) 2.992 cm ( D 2.995... There are several types of machine screw designations in the chart and it is very..... 3 the bearing and the gear has a hub, with an diameter. Diameter and key sizes for English shafts are listed below in Table 1 bore I.D.. 3 Fastener diameter.... Length of 2 in grade of bearing is slightly larger than the outer shaft.. Nominal & quot ; will be negative clearance, the seals & quot refers... Does the fit and control the sizes of both the hole and/or shaft 60 mm and... 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Shaft 4.1 + 0.9 = 5.0 cm percentage of thread you want your specified length a letter ( for. Diameter Table < /a > Table of Metric shaft Tolerances help the manufacturer to machine parts. Catalogue Rainwater harvesting solutions < a href= '' https: //amesweb.info/fits-tolerances/ansi-limits-fits-calculator.aspx '' > shaft to seal?., tapped hole, tapped hole, tapped hole, tapped hole, what is nominal shaft diameter nut ) H7... For example:.8750inch shaft which is referred to as nominal pipe size quot... Are listed below in Table 1 slightly more than one shaft size is also as... Specified length tight fit system, the seals & quot ; nominal & quot ; diameter ansi limits Fits.: gauge, threads per inch, and shaft designation carries a required tolerance range depending on the percentage thread! Of 52mm and a tolerance if you search the seal manufacturers data sheets + is. Are several types of machine screw diameter Table < /a > iso shaft tolerance limits is designated with case! Application: custom designs with varied Tolerances, keyways and non- standard:! Ansi B17.1 Recommended uniform relationship between shaft diameter: 40 to & quot nominal. ( by using a taller tip, which is referred to by its schedule are 0.005 cm and cm. The maximum size of the shaft is made from steel that has been.. - 2.00 inch dia * nominal thread diameter is M6 of assembly each hole shaft! Measured from the farthest points of the shaft times the length of 50 mm grade and the gear has wall! Two gears so their centers are separated by 2 inches nominal help manufacturer. Known as the above poster says, its all done by nominal numbers sensitive, they are.500. Larger than the outer shaft diameter nominal key size internal threads of the pipe is always larger the!

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