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Torque Settings for Steel Fasteners

Torque Settings for Steel Fasteners

Grade "A"
Diameter of thread BSW BSF UNC UNF
1/4" 3.6 4 3.6 4
5/16" 7.4 7.9 7.4 8.2
3/8" 13 14 13 15
7/16" 21 23 21 23
1/2" 31 34 32 36
9/16" 46 50 46 52
5/8" 64 66 64 72
3/4" 113 118 114 126
7/8" 181 191 183 201
1" 272 288 274 299
1 1/8" 367 411 389 434
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "P"
Diameter of thread BSW BSF UNC UNF
1/4" 5.3 5.9 5.3 6
5/16" 11 12 11 12
3/8" 19 21 19 22
7/16" 31 33 31 34
1/2" 46 50 47 53
9/16" 68 73 68 76
5/8" 93 100 94 106
3/4" 166 173 167 185
7/8" 266 280 269 295
1" 400 422 402 438
1 1/8" 567 602 570 637
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "R"
Diameter of thread BSW BSF UNC UNF
1/4" 8.2 9.1 8.2 9.3
5/16" 17 18 17 19
3/8" 30 32 30 34
7/16" 48 51 48 53
1/2" 70 77 73 82
9/16" 104 113 105 117
5/8" 144 154 145 164
3/4" 256 268 256 286
7/8" 411 433 415 456
1" 617 652 621 678
1 1/8" 876 931 881 964
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "S"
Diameter of thread BSW BSF UNC UNF
1/4" 9.1 9.1 10 10
5/16" 19 19 20 21
3/8" 33 33 36 36
7/16" 53 53 58 60
1/2" 79 82 85 91
9/16" 117 117 126 131
5/8" 161 162 172 183
3/4" 286 288 300 319
7/8" 460 464 464 510
1" 690 695 729 757
1 1/8" 979 985 1041 1100
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "T"
Diameter of thread BSW BSF UNC UNF
1/4" 11 12 11 12
5/16" 22 23 22 24
3/8" 38 41 39 44
7/16" 62 67 62 69
1/2" 91 100 94 106
9/16" 135 146 137 152
5/8" 187 200 188 212
3/4" 331 347 333 370
7/8" 532 580 537 590
1" 799 844 804 877
1 1/8" 1134 1205 1140 1273
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "X"
Diameter of thread BSW BSF UNC UNF
1/4" 15 17 15 17
5/16" 31 33 31 34
3/8" 55 59 55 63
7/16" 88 95 89 99
1/2" 130 143 135 152
9/16" 194 210 195 217
5/8" 267 286 269 304
3/4" 474 497 477 529
7/8" 762 802 769 845
1" 1144 1208 1152 1255
1 1/8" 1624 1725 1632 1823
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

If you have any questions or comments send e-mail to: ted@jag-lovers.org
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