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1、JAPANESE INDUSTRIAL STANDARD Limits of Sizes and Tolerances for Unified Coarse Screw Threads *. . . . JIS B O2 1 0 - 1 9 7 3 Translated and Published Japanese Standards Association I r ;- i .-_ . . Printed in Japan JPS B*KO2LO 73 4933608 0007615 B = UDC 621.822.082.3:621.753.1 JAPANESE INDUSTRIAL ST
2、ANDARD J I S Limits of Sizes and Tolerances for Unified Coarse Screw Threads B 021 0-1 973 1. Scope This Japanese Industrial Standard specifies limits of sizes and tolerances for unified coarse screw threads specified in JIS B 0206-Unified Coarse Screw Threads, mainly used for the purpose of fasteni
3、ng. 2. Fundamental Deviations Relations of Basic Profile, Basic Dimensions, Limits of Sizes, Tolerances and The relations of basic profile, basic dimensions, limits of sizes, tolerances and fundamental deviations are shown in the following Figure: For Classes 3 B, 2 B and I B Screw Threads (EI = O)
4、F o r Class 3 A Screw Thread For Classes 2 A and I A - (es = O ) Screw Threads (es 5 a, z O 2 a, L 2 c a, KI No. 1-64 UNC NO. 2-56 UNC NO. 3-48 UNC 1.645 1.943 2.227 1.598 1.890 2.172 : 1 i: I :i;: 0.055 2.146 1.941 O. 157 O. 176 o. 205 No. 440 UNC No. 540 UNC NO. .6-32 UNC 2.494 2.827 3.058 2.434 2
5、.764 2.990 2.157 2.487 2.642 O. 228 o. 210 O. 253 0,060 2.385 0,063 2.697 0.068 2.895 NO. 8-32 UNC NO. 10-24 UNC NO. 12-24 UNC 3.721 4.218 4.881 3.650 4.138 4.799 3.302 3.683 4.344 O. 226 O. 266 O. 245 0.071 3.528 0,080 3.949 0.082 4.549 1/4-20 UNC 6/16-18 UNG 3i8-16 UNC 5.615 7.119 8.602 5.525 7.02
6、1 8.494 0.090 I 5.250 0.098 6.680 0.108 8.082 4.979 6.401 7.798 O. 271 O. 279 O. 284 7/16-14 UNC 12-13 UNC 9h-12 UNC 10.050 11.551 13.042 14.513 17.543 20.546 9.934 0.116 9.441 11.430 0.121 10.881 12.914 0.128 12.301 14.377 0.136 13.693 17.399 0.144 16.624 20.392 0.154 19.509 23.338 0.167 22.344 26.
7、218 0.180 25.082 29.393 0.182 28.257 32.175 0.197 30.850 35.350 0.199 34.025 41.151 0.220 39.560 47.135 0.236 45.366 53.485 0.241 51.716 59.376 0.255 57.388 65.726 0.260 63.738 72.076 0.263 70.088 78.426 0.268 76.438 84.776 0.273 82.788 91.126 0.275 89.138 97.476 0.280 95.488 _ _ _ _ _ _ _ _ _ _ _ _
8、 _ _ _ _ _ 9.144 0.297 10.592 0.289 11.989 0.312 13.386 0.307 16.307 0.317 19.177 0.332 21.971 0.373 24.638 0.444 27.813 0.444 30.353 0.497 33.528 0.497 38.964 0.596 .44.679 O. 687 51.029 0.687 56.617 0,771 _ _ /e - 1 1 UNc 3/4 -10 UNC “/e - 9 UNC 23.505 26.398 29.575 32.372 35.549 41.371 47.371 59.
9、631 65.986 72.339 78.694 85.049 91.401 97.756 53.726. 23/4- 4 UNC 3 - 4 UNC 311.4 - 4 UNC s1/2- 4 UNC 33/4 - 4 UNC 4 - 4 UNC 62.967 0.771 69.317 0.771 75.667 0.771 82.017 0.771 88.367 0.771 94.717 0.771 1 Notes ( ) (2) The values in this column are not always coincident with the calculated values of
10、 D2 min. - D or D min. - The minimum limits of sizes for major diameter of internal threads are not specified, but a small clearance shall be provided between the root and basic profile, as a rule, Dl 2 1 Remark: The values of limits of sizes and tolerances given in this Table are applicable to the
11、product having the length of thread engagement not exceeding 1 .5 d. -,-,- _ -_- JIS B*0210 73 4933608 0007618 3 M 4 B 0210-1973 Table 2. Limits of Sizes and Tolerances for Unified Coarse Screw Threads (for Class 3 A Screw Threads) unit : mm Designation of screw thread Reference) 7unarnenta leviatio
12、n esc3 O Major diameter Pitch diameter Minor diameter (Ref .) di mad4 1.366 1.628 i. a dmnx. - i. a54 2.184 2.515 di min. d z max , 1.597 2.171 2.433 2.763 i. a89 2.989 dmin. i. 758 2. oai 2.401 T d O. 096 O. 103 O. 114 d z min, 1.560 1.850 2.129 Tdz O. 037 O. 039 o. 042 No. 1 6 4 UNC NO. 2-56 UNC N
13、 . 348 UNC NO. 4-40 UNC No. 540 UNC NO. 6-32 UNC 2. a44 3.175 3.505 2.716 3.046 3.353 o. 128 O. 129 O. 152 2.386 2.716 2.937 O. 047 O. 047 O. 052 2.065 2.395 2.532 N . 8-32 UNC NO. 10-24 UNC NO. 12-24 UNC 4.165 5.486 4.826 4.014 4.644 5.304 O. 151 o. ia2 o. ia2 3.649 4.137 4.798 3.595 4.075 4.733 O.
14、 054 O. 062 O. 065 3.192 3.528 4. iaa 6.350 7.937 9.525 6.145 7.717 9.287 O. 205 o. 220 o. 238 5.524 7.020 a. 493 5.454 6.945 8.410 O. 070 O. 075 O. 083 4.792 6.205 7.576 1/4-20 UNC 5/16-18 UNC 3/6-16 UNC 7/16-14 UNC 1/2-13 UNC 911612 UNC 11.112 12.700 14. 288 io. 851 13.998 12.424 O. 261 O. 276 o.
15、289 9.933 11.430 12.913 9. ai6 11.336 12.814 a. a87 10.302 11.691 13.042 15.933 ia. 762 21.503 24.122 27.297 O. 087 O. 094 o. o99 O. 103 o. 1 1 1 O. 119 _ 5/8-11 UNC 3/4 -10 UNC 7/8 - 9 UNC i - a UNC lila - 7 UNC li/4 - 7 UNC lys- 6 UNC l/z - 6 UNC 13/4 - 5 UNC 15.875 19.050 22.225 O. 307 O. 327 o.
16、353 14.376 17.399 20.391 14.273 17.288 20.272 23.208 26. oai 29.254 25,400 28.575 31.750 25.019 31.334 28.159 o. 381 O. 416 O. 416 23.337 26.217 29.392 O. 129 O. 136 O. 138 O. 462 O. 462 O. 520 32.174 35.349 41.150 32.022 35.195 40.981 O. 152 O. 154 O. 169 29.730 32.905 33.216 34.463 37.638 43.930 5
17、0.242 56.592 62.896 69.246 75.596 ai. 946 88.296 94.646 100.996 - 34.925 38.100 50. ao0 14.450 57.150 63.500 69. a50 82.550 aa. 900 76.200 95.250 101.600 47.134 53.484 59.375 O. 179 o. ia4 o. 198 43. a75 50.225 55.709 46.955 53.300 59.177 65.525 71.872 78.217 84.565 90.912 97.260 O. 558 o. 558 O. 60
18、4 O. 604 O. 601 O. 604 O. 604 O. 604 O. 604 23/4 - 4 UNC 3 - 4 UNC 31/4 - 4 UNC 65.725 72.075 78.425 84.775 91.125 97.475 62.059 68.409 74.759 ai. io9 87.459 93. ao9 - o. 200 O. 203 o. 208 o. 210 O. 213 O. 215 31/2 - 4 UNC 33/4- 4 UNC 4 - 4 UNC Notes (3) 4 ( ) The values in this column are not alway
19、s coincident with the calculated values of d max. - d or d max. - Maximum limits of sizes in case of root truncation of external threads being H/6 (H is height of basic triangle) are given for reference. d2 2 Remarks 1. The edges at the crest of external threads shall, as a rule, not be rounded, but
20、 the rounding within the extent of O. 1 P is permitted for the manufacturing reason. 2. For the screw threads upon which strength for a dynamic load comes into question, a rounding of O. 1 P or larger shall be provided at the root of external threads. 3 . The values of limits of sizes and tolerances
21、 given in this Table are applicable to the product having the length of thread engagement not exceeding 1 .5 d. -,-,- J I S B*0210 73 W 4933b08 0007bL 5 I 5 B 0210-1973 Table 3. Limits of Sizes and Tolerances for Unified Coarse Screw Threads (for Class 2 B Screw Threads) Unit : mm _c_/ Fierence) und
22、amental euiatiou EI (9 O Designation of screw thread Major diameter Pitch diameter Minor diameter Di mox. 1.582 1.871 2.146 - DI min. 1.425 1.695 1.941 - D min. - n C u ? al c 2 al al cn D z max . 1.663 1.960 2.247 2.517 2.847 3.083 3.746 4.246 4.909 - Dz min. 1.598 1.890 2.172 2.434 2.764 2.990 3.6
23、50 4.138 4.799 5.525 7.021 8.494 D max. _b_ a al o al a r 4 2 E x c, T D i O. 065 O. 070 O. 075 O. 157 O. 176 O. 205 No. 1-64 UNC No. 3-48 UNC No. 440 UNC No. 540 UNC NO. 2-56 UNC NO. 6-32 UNC NO. 8-32 UNC NO. 10-24 UNC NO. 12-24 UNC 1/4-20 UNC 5/16-18 UNC 3/8-16 UNC O. 083 O. 083 O. 093 2.157 2.487
24、 2.642 2.385 2.697 2.895 3.530 3.962 4.597 O. 228 o. 210 O. 253 O. 228 O. 279 O. 253 O. 096 O. 108 o. 110 3.302 3.683 4.344 5.648 7.155 8.638 O. 123 o. 134 o. 144 5.257 6.731 8.153 O. 278 O. 330 o. 355 4.979 6.401 7.798 9.144 10.592 11.989 10.088 11.595 13.086 9.934 11.430 12.914 o. 154 O. 165 O. 17
25、2 9.550 11.023 12.446 O. 406 O. 431 o. 457 5/8-11 UNC “4 -10 UNC ila - 9 UNC 14.559 17.594 20.599 14.377 17.399 20.392 O. 182 O. 195 O. 207 O. 482 o. 533 O. 584 13.868 16.840 19.761 22.606 25.349 28.524 13.386 16.307 19.177 21.971 24.638 27.813 1 - 8 UNC ll/s - 7 UNC 11/4 - 7 UNC 23.561 26.456 29.63
26、6 23.338 26.218 29.393 O. 223 O. 238 O. 243 O. 635 O. 711 O. 711 lS/a - 6 UNC i/* - 6 UNC 13/4 - 5 UNC 32.438 35.615 41.445 32.175 35.350 41.151 O. 263 O. 265 O. 294 31.115 34.290 39.827 30.353 33.528 38.964 O. 762 O. 762 O. 863 47.135 53.485 59.376 O. 314 O. 319 O. 341 44.679 51.029 56.617 O. 914 O
27、. 914 o. 964 47.449 53.804 59.717 66.073 72.428 78.783 45.593 51.943 57.581 63.931 70.281 76.631 82.981 89.331 95.681 - 23/4 - 4 UNC 3 - 4 UNC 31/4 - 4 UNC 65.726 72.076 78.426 o. 347 O. 352 o. 357 62.967 69.317 75.667 O. 964 O. 964 O. 964 O. 964 o. 964 o. 964 - 3112- 4 UNC 33/4- 4 UNC 4 - 4 UNC 85.
28、138 97.848 91.493 _ I 84.776 91.126 97.476 - 82.017 88.367 94.717 - O. 362 O. 367 O. 372 I Notes ( ) The values in this column are not always coincident with the calculated values of D min.- D or D min. - . 2 2 I The minimum limits of sizes for major diameter of internal threads are not specified, b
29、ut a small clearance shall be provided between the root and basic profile, as a rule. 2 ( ) Remark: The values of limits of sizes and tolerances given in this Table are applicable to the product having the length of thread engagement not exceeding I . 5 d. Il m 6 B 0210-1973 Table 4. Limits of Sizes
30、 and Tolerances for Unified Coarse Screw Threads (for Class 2 A Screw Threads) unit : mm Designation of screw thread Major diameter Pitch diameter Minor diameter Relerencel ?undamenta leviation 43) -0.016 -0.016 -0.019 (Ref .) di maxf4 1.351 1.612 1.846 - d mnx. d min, T d d Z max . dz min. di min .
31、 T d z NO. 1-64 UNC NO. 2-56 UNC NO. 3-48 UNC 1.838 2.169 2.496 1.743 2.066 2.383 O. 095 O. 103 O. 113 1.582 1.874 2.153 1.532 1.822 2.096 O. 050 O. 052 O. 057 NO. 440 UNC No. 540 UNC NO. 6-32 UNC -0.021 -0.021 -0.021 2.824 3.154 3.484 2.695 3.026 3.333 O. 129 O. 128 O. 151 2.413 2.743 2.969 2.350 2
32、.678 2.899 O. 063 O. 065 O. 070 2.044 2.374 2.512 NO. 8-32 UNC NO. 10-24 UNC NO. 12-24 UNC -0.023 -0.026 -0.027 4.142 4.800 5.461 3.169 3.502 4.163 3.627 4.112 4.772 5.496 6.990 8.460 3.991 4.618 5.279 6.117 7.687 9.254 10.816 12.386 13.958 15.528 18.677 21.824 O. 151 O. 182 O. 182 O. 205 o. 220 O.
33、237 O. 260 O. 275 O. 288 O. 306 O. 327 O. 352 3.554 4.029 4.687 5.403 6.889 8.349 O. 073 O. 083 O. 085 O. 093 o. 101 o. 1 1 1 4.765 6.174 7.543 -0.029 -0.031 -0.034 6.322 7.907 9.491 1/4-20 UNC 5/16-18 UNC 3/6-16 UNC 7/i6-14 UNC 12-13 UNC 91i6-12 UNC 5/6-11 UNC 3/4-10 UNC 7 1 s - 9 UNC 9.898 11.392
34、12.873 9.779 11.265 12.741 O. 119 O. 127 O. 132 8.851 10.264 11.650 -0.036 -0.038 -0.041 11.076 12.661 14.246 15.834 19.004 22.176 13.002 15.887 18.714 -0.042 -0.046 -0.050 O. 138 O. 149 O. 159 O. 172 O. 182 O. 187 o. 202 O. 205 O. 225 O. 241 O. 246 O. 263 O. 265 O. 271 O. 276 14.335 17.353 20.342 2
35、3.286 26.162 29.337 32.113 35.288 41.082 14.197 17.204 20.183 23.114 25.980 29.150 31.911 35.083 40.856 21.452 24.066 27.241 1 - 8 UNC l/s - 7 UNC li/4 - 7 UNC -0.052 -0.056 -0.056 25.349 28.519 31.694 24.969 28.103 31.278 O. 380 O. 416 O. 416 O. 462 O. 462 O. 520 29.669 32.844 38.148 l3/8 - 6 UNC 1
36、112 - 6 UNC 1 3 1 - 5 UNC -0.062 -0.062 -0.070 34.864 38.039 44.381 34.402 37.577 43.861 -0.074 -0.074 -0.080 50.726 57.076 63.421 50.168 56.518 62.817 O. 558 O. 558 O. 604 47.061 53.411 59.296 46.820 53.165 59.033 43.802 50.152 55.631 61.978 68.328 74.676 2 - 4/zUNC 2 1 1 4 - 4*/zUNC 21/2 - 4 UNC _
37、- 2314 - 4 UNC 3 - 4 UNC 3 1 1 4 - 4 UNC -0.083 -0.083 -0.085 69.768 76.118 82.466 69.165 75.515 81.862 O. 603 O. 603 O. 60-1. 65.643 71.993 78.341 65.378 71.722 78.065 S1/2- 4 UNC 3%- 4 UNC 4 - 4 UNC -0.085 -0.088 -0.088 88.816 95.163 101.513 88.212 94.560 OO. 910 O. 604 O. 603 O. 603 84.691 91.038
38、 97.388 84.412 90.755 97.102 - O. 279 O. 283 O. 286 - 81.026 87.373 93.723 - 3 Notes ( ) The values in this column are not always coincident with the calculated values of d max. - d or d max. - Maximum limits of sizes in case of root truncation of external threads being H/6 (H is height of basic tri
39、angle) are given for reference. d2 2 4 ( ) Remarks I . The edges at the crest of external threads shall, as a rule, not be rounded, but the rounding within the extent of O. 1 P is permitted for the manufacturing reason. 2. For the screw threads upon which strength for a dynamic load comes into quest
40、ion, a rounding of O. 1 P or larger shall be provided at the root of external threads. 3. The values of limits of sizes and tolerances given in this Table are applicable to the product having the length of thread engagement not exceeding i .5 d. -,-,- J I S B*O23U 73 4933b08 0007b23 3 B 0210-1973 7
41、Table 5. Limits of Sizes and Tolerances for Unified Coarse Screw Threads (for Class I B Screw Threads) . Unit : mm Designation of screw thread ieference) undamental euiation EI(9 O hiajor diameter Pitch diameter Minor diameter Dz min. 7.0, Di min, 4.979 6.401 7.798 9.144 10.592 11.989 13.386 16.307
42、19.177 - Di mnx . 5.257 6.731 8.153 mnx. D min. Dz mnx . 5.709 7.221 8.709 1/4-20 UNC 5/16-18 UNC 3/8-16 UNC 5.525 7. o21 8.494 O. 184 o. 200 O. 215 O. 278 O. 330 o. 355 /16-14 UNC 3/2-13 UNC . 9/16-12 UNC 10.167 11.676 13.172 9.934 11.430 12.914 o. 233 O. 258 o. 246 O. 406 O. 431 o. 457 9.550 11. o
43、23 12.446 13.868 16.840 19.761 58 -11 UNC 3/4-10 UNC Y a - 9 UNC 14.618 17.691 20.703 14.377 17.399 20.392 O. 271 O. 292 O. 311 O. 482 o. 533 o. 584 I - 8 UNC l/a - 7 UNC l1/4 - 7 UNC 23.672 26.576 29.759 23.338 26.218 29.393 o. 334 O. 358 O; 365 22.606 25.349 28.524 21.971 24.638 27.813 O. 635 O. 7
44、11 O. 711 u - a, +I 2 a , a, rn l3/8 - 6 UNC lh - 6 UNC 131- 5 UNC 32.567 35.750 41.592 32.175 35.350 41.151 o. 392 O. 400 O. 441 31.115 34.290 39.827 30.353 33.528 38.964 0.762 . O. 762 O. 863 2 - 41/zUNC 214 - 41/zUNC 212 - 4 UNC 47.607 53.967 59.888 47.135 53.485 59.376 o. 472 O. 482 O. 512 45.59
45、3 51.943 57.581 44.679 51.029 56.617 O. 914 O. 914 O. 964 2314- 4 UNC 3 - 4 u N c 314- 4 UNC 66.248 72.605 78.963 65.726 72.076 78.426 o. 522 O. 529 o. 537 63.931 70.281 76.631 62.967 69.317 75.667 o. 964 O. 964 O. 964 312- 4 UNC 3314 - 4 UNC 4 - 4 UNC o. 545 o. 552 O. 560 - 82.981 89.331 95.681 82.
46、017 88.367 94.717 - O. 964 O. 964 O. 964 84.776 91.126 97.476 85.321 91.678 98.036 I Notes ( ) The values in this column are not always coincident with the calculated values of D2 min. - D or D min. - 2 1 2 ( ) The minimum limits of sizes for major diameter of internal threads are not specified, but
47、 a small clearance shall be provided between the root and basic profile, as a rule. Remarks 1 . The values of limits of sizes and tolerances given in this Table are applicable to the product having the length of thread engagement not exceeding I. 5 d. 2. Limits of sizes and tolerances for Class I B
48、screw threads of No. 1-64 UNC to No, 12-24 UNC are not specified. J I S BUU2LO 73 Li933608 00117b22 5 W 8. B 0210-1973 Table 6. Limits of Sizes and Tolerances for Unified Coarse Screw Threads (for Class 1 A Screw Threads) Unit : mm Major diameter Pitch diamter Minor diameter IReerence) ?unciamenta i
49、eviation es(9 -0.029 -0.031 -0.034 Designation of screw thread (Ref. ) - di mnxC4 4.765 6.174 7.543 d mnx. 6.322 7.907 9.491 11.076 12.661 14.246 dz mnx . 5.496 6.990 a. 460 9. a98 12. a73 11.392 14.335 17.353 20.342 23.286 26.162 29.337 32.113 35.288 .ii.oa2 47.061 53.411 59.296 65.643 71.993 78.341 84.691 91.038 97.388 d min. 6.013 7.575 9.132 10.684