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DIN 939 Standard Dimensions for Studs, with engagement length ~1,25d

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This standard (DIN 939) specifies dimensions and technical delivery conditions for studs intended for use mainly in cast iron; with stud end ~ 1,5 d (lenght of engagement) product grade A with metric coarse thread from M4 to M52 and metric fine thread from M8x1 to M52x3.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 939
Publication date 02-1995 - Supersedes DIN 939: 02-1972

d thread size

 M 4 M 5 M 6 M 7 M 8 M8X1 M 10 M10X1.25 M 12 M12X1.5 M 14 M14X1.5 M 16 M16X1.5 M 18 M18X1.5 M 20 M20X1.5 M 22 M22X1.5 M 24 M24X2
b1 5 6.5 7.5 9 10 12 15 18 20 22 25 28 30
b2 (l<=125) 14 16 18 20 22 26 30 34 38 42 46 50 54
b2 (l>125<=200) 20 22 24 26 28 32 36 40 44 48 52 56 60
b2 (l>200) - - - - - 45 49 53 57 61 65 69 73
x1 1.75 2 2.5 2.5 3.2 3.8 4.3 5.0 5.0 6.3 6.3 6.3 7.5
x2 0.9 1 1.25 1.25 1.6 1.9 2.2 2.5 2.5 3.2 3.2 3.2 3.8

Dimensions in mm - source DIN 939

Publication date 02/1995

d thread size

 M 27 M27X2 M 30 M30X2 M 33 M33X2 M 36 M36X3 M 39 M39X3 M 42 M42X3 M 45 M45X3 M 48 M48X3 M 52 M52X3
b1 35 38 42 45 50 52 58 60 65
b2 (l<=125) 60 66 72 78 84 90 96 102 110
b2 (l>125<=200) 66 72 78 84 90 96 102 108 116
b2 (l>200) 79 85 91 97 103 109 115 121 129
x1 7.5 9.0 9 10 10 11 11 12.5 12.5
x2 3.8 4.5 4.5 5 5 5.5 5.5 6.3 6.3

DIN 939 -Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial items

Publication date 02-1995
d thread size
M4
M5
M6
 M7 M8
M10
 M12 M14 M16 M18 M20 M22 M24
nominal length l
12
14
16
18
20 2.03
22 2.23 3.65
25 2.52 4.11 5.85
28 2.82 4.57 6.52 9.49
30 3.02 4.88 6.96 10.1 13.1
35 3.51 5.65 8.07 11.6 15.31 24.2
40 4.01 6.42 9.18 13.1 17 27.2 41
45 7.19 10.2 14.6 19 30.3 45.4 64
50 7.96 11.4 16.1 21 33.3 49.9 70 94.9
55 12.5 17.7 22.9 36.4 54.3 76.1 103 130
60 13.6 19.2 24.9 39.5 58.8 82.1 111 140 180
65 20.7 26.9 42.6 63.2 88.2 119 150 192 242
70 22.2 28.9 45.7 67.6 94.2 126 160 205 257 305
75 30.8 48.8 72.1 100 134 170 217 272 323
80 32.8 51.8 76.5 106 142 180 229 287 341
85 54.9 81 112 150 190 241 302 358
90 58 85.4 119 158 199 254 317 376
95 61.1 89.8 124 166 210 266 332 394
100 64.2 94.3 130 174 220 279 346 412
110 103 143 190 240 303 376 447
120 112 155 205 260 328 406 483
130 167 221 280 353 436 518
140 179 237 300 377 466 554
150 253 320 402 496 589
160 269 340 427 525 625
170 360 451 555 660
180 380 476 585 696
190 501 615 731
200 525 645 767

DIN 939 -Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial lengths

Publication date 02-1995
d thread size M27 M30 M33 M36 M39 M42 M45 M48 M52
nominal length l
50
55
60
65
70
75 430
80 452
85 475 591
90 497 619 776
95 520 646 810
100 542 674 843 1011
110 587 730 910 1091 1326
120 632 785 977 1171 1420 1647 1693
130 677 841 1045 1251 1514 1756 2088 2364
140 722 896 1112 1331 1607 1865 2213 2506 3027
150 767 952 1179 1411 1701 1973 2338 2648 3194
160 812 1007 1246 1490 1795 2082 2462 2790 3360
170 857 1062 1313 1570 1889 2191 2587 2932 3527
180 902 1118 1380 1650 1982 2300 2712 3074 3694
190 947 1173 1447 1730 2076 2408 2837 3216 3861
200 992 1229 1515 1810 2170 2517 2962 3358 4027
220 1082 1340 1649 1970 2358 2735 3211 3642 4361
240 1172 1450 1784 2130 2545 2952 3461 3927 4694
260 1262 1562 1918 2289 2733 3170 3711 4211 5028
280 1352 1672 2052 2449 2920 3387 3961 4495 5361
300 1784 2186 2609 3108 3605 4210 4479 5694
320 2321 2769 3295 3822 4460 5063 6028
340 2455 2929 3483 4040 4710 5374 6361
360 3088 3670 4257 4959 5631 6695
380 3858 4475 5209 5915 7028
400 4045 4692 5459 6199 7362

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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