manufacturer of nickel products

 

Bolt Torque Chart


ASTM A307, Grade 2, A325, A449, Grade 5, A193 B7, A320 L7, A490, A354, Grade 8

ASTM A307

Bolt Size TPI Proof Load (lbs)1 Clamp Load (lbs)2 Tightening Torque (ft lbs)
Galv+Waxed Galv Plain
1⁄4 20 1,053 790 2 4 3
5⁄16 18 1,735 1,302 3 8 7
3⁄8 16 2,567 1,925 6 15 12
7⁄16 14 3,521 2,640 10 24 19
1⁄2 13 4,700 3,525 15 37 29
9⁄16 12 6,028 4,521 21 53 42
5⁄8 11 7,485 5,614 29 73 58
3⁄4 10 11,062 8,297 52 130 104
7⁄8 9 15,301 11,476 84 209 167
1 8 20,071 15,053 125 314 251
11⁄8 7 25,271 18,953 178 444 355
11⁄4 7 32,093 24,070 251 627 501
13⁄8 6 38,254 28,690 329 822 657
11⁄2 6 46,534 34,900 436 1,091 873
13⁄4 5 62,928 47,196 688 1,721 1,377
2 41⁄2 82,800 62,100 1,035 2,588 2,070
21⁄4 41⁄2 107,640 80,730 1,514 3,784 3,027
21⁄2 4 132,480 99,360 2,070 5,125 4,140
23⁄4 4 163,282 122,461 2,806 7,016 5,613
3 4 197,726 148,295 3,707 9,268 7,415
31⁄4 4 235,152 176,364 4,777 11,941 9,553
31⁄2 4 275,890 206,917 6,035 15,088 12,070
33⁄4 4 319,939 239,954 7,499 18,746 14,997
4 4 366,970 275,227 9,174 22,936 18,348

 

SAE Grade 2

Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs)
Galv+Waxed Galv Plain
1⁄4 20 1,750 1,313 3 7 5
5⁄16 18 2,900 2,175 6 14 11
3⁄8 16 4,250 3,188 10 25 20
7⁄16 14 5,850 4,388 16 40 32
1⁄2 13 7,800 5,850 24 61 49
9⁄16 12 10,000 7,500 35 88 70
5⁄8 11 12,400 9,300 48 121 97
3⁄4 10 18,400 13,800 86 216 173
7⁄8 9 15,200 11,400 83 208 166
1 8 20,000 15,000 125 313 250
11⁄8 7 25,200 18,900 177 443 354
11⁄4 7 32,000 24,000 250 625 500
13⁄8 6 38,100 28,575 327 819 655
11⁄2 6 46,400 34,800 435 1,088 870

ASTM A325

Bolt Size TPI Tension Tightening Torque Range (ft lbs) (Min - Max)
Min Max Galv+Waxed Plain
1⁄2 13 12,000 14,000 50 - 58 100 - 117
5⁄8 11 19,000 23,000 99 - 120 198 - 240
3⁄4 10 28,000 34,000 175 - 213 350 - 425
7⁄8 9 39,000 47,000 284 - 343 569 - 685
1 8 51,000 61,000 425 - 508 850 - 1,017
11⁄8 7 64,000 77,000 600 - 722 1,200 - 1,444
11⁄4 7 81,000 98,000 844 - 1,021 1,687 - 2,042
13⁄8 6 97,000 117,000 1,111 - 1,341 2,223 - 2,681
11⁄2 6 118,000 143,000 1,475 - 1,788 2,950 - 3,575

ASTM A449 / SAE Grade 5*

Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs)
Galv+Waxed Galv Plain
1⁄4 20 2,700 2,025 4 11 8
5⁄16 18 4,450 3,338 9 22 17
3⁄8 16 6,600 4,950 15 39 31
7⁄16 14 9,050 6,788 25 62 49
1⁄2 13 12,050 9,038 38 94 75
9⁄16 12 15,450 11,588 54 136 109
5⁄8 11 19,200 14,400 75 188 150
3⁄4 10 28,400 21,300 133 333 266
7⁄8 9 39,250 29,438 215 537 429
1 8 51,500 38,625 322 805 644
11⁄8 7 56,450 42,338 397 992 794
11⁄4 7 71,700 53,775 560 1,400 1,120
13⁄8 6 85,450 64,088 734 1,836 1,469
11⁄2 6 104,000 78,000 975 2,438 1,950
13⁄4 5 104,500 78,375 1,143 2,857 2,286
2 41⁄2 137,500 103,125 1,719 4,297 3,438
21⁄4 41⁄2 178,750 134,063 2,514 6,284 5,027
21⁄2 4 220,000 165,000 3,438 8,594 6,875
23⁄4 4 271,150 203,363 4,660 11,651 9,321
3 4 328,350 246,263 6,157 15,391 12,313
* SAE J429 grade 5 bolts do not exceed 1-1/2" diameter.

 

ASTM A193 B7 / ASTM A320 L7

Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs)
Galv+Waxed Galv Plain
1⁄4 20 3,350 2,513 5 13 10
5⁄16 18 5,500 4,125 11 27 21
3⁄8 16 8,150 6,113 19 48 38
7⁄16 14 11,150 8,363 30 76 61
1⁄2 13 14,900 11,175 47 116 93
9⁄16 12 19,100 14,325 67 168 134
5⁄8 11 23,750 17,813 93 232 186
3⁄4 10 35,050 26,288 164 411 329
7⁄8 9 48,500 36,375 265 663 530
1 8 63,650 47,738 398 995 796
11⁄8 7 80,100 60,075 563 1,408 1,126
11⁄8 8 82,934 62,201 583 1,458 1,166
11⁄4 7 101,750 76,313 795 1,987 1,590
11⁄4 8 105,006 78,754 820 2,051 1,641
13⁄8 6 121,300 90,975 1,042 2,606 2,085
13⁄8 8 129,492 97,119 1,113 2,782 2,226
11⁄2 6 147,550 110,663 1,383 3,458 2,767
11⁄2 8 156,687 117,515 1,469 3,672 2,938
13⁄4 5 199,500 149,625 2,182 5,455 4,364
13⁄4 8 218,400 163,800 - - 4,778
2 41⁄2 262,500 196,875 3,281 8,203 6,563
2 8 290,850 218,138 - - 7,271
21⁄4 41⁄2 341,250 255,938 4,799 11,997 9,598
21⁄4 8 373,801 280,351 - - 10,513
21⁄2 4 420,000 315,000 6,563 16,406 13,125
21⁄2 8 466,200 349,650 - - 14,569
23⁄4 4 468,500 351,263 8,050 20,124 16,100
23⁄4 8 515,851 386,888 - - 17,732
3 4 567,150 425,363 10,634 26,585 21,268
3 8 618,451 463,838 - - 23,192
31⁄4 4 674,500 505,875 13,701 34,252 27,402
31⁄4 8 730,550 547,913 - - 29,679
31⁄2 4 791,350 593,513 17,311 43,277 34,622
31⁄2 8 851,201 638,401 - - 37,240
33⁄4 4 917700 688275 21,509 53,771 43,017
33⁄4 8 982,300 736,725 - - 46,045
4 4 1052600 789450 26,315 65,788 52,630
4 8 1,121,950 841,463 - - 56,098

 

ASTM A490

Bolt Size TPI Tension (lbs) Tightening Torque Range (ft lbs) (Min - Max)
Min Max Plain Lubricated
1⁄2 13 15,000 18,000 125 - 150 63 - 75
5⁄8 11 24,000 29,000 250 - 302 125 - 151
3⁄4 10 35,000 42,000 438 - 525 219 - 263
7⁄8 9 49,000 59,000 715 - 860 357 - 430
1 8 64,000 77,000 1,067 - 1,283 533 - 642
11⁄8 7 80,000 96,000 1,500 - 1,800 750 - 900
11⁄4 7 102,000 122,000 2,125 - 2,542 1,063 - 1,271
13⁄8 6 121,000 145,000 2,773 - 3,323 1,386 - 1,661
11⁄2 6 148,000 178,000 3,700 - 4,450 1,850 - 2,225

 

ASTM A354-BD / SAE Grade 8*

Bolt Size TPI Proof Load (lbs) 1 Clamp Load (lbs) 2 Tightening Torque (ft lbs)
Plain Lubricated
1⁄4 20 3,800 2,850 12 6
5⁄16 18 6,300 4,725 25 12
3⁄8 16 9,300 6,975 44 22
7⁄16 14 12,750 9,563 70 35
1⁄2 13 17,050 12,788 107 53
9⁄16 12 21,850 16,388 154 77
5⁄8 11 27,100 20,325 212 106
3⁄4 10 40,100 30,075 376 188
7⁄8 9 55,450 41,588 606 303
1 8 72,700 54,525 909 454
11⁄8 7 91,550 68,663 1,287 644
11⁄4 7 120,000 90,000 1,875 938
13⁄8 6 138,600 103,950 2,382 1,191
11⁄2 6 168,600 126,450 3,161 1,581
13⁄4 5 228,000 171,000 4,988 2,494
2 41⁄2 300,000 225,000 7,500 3,750
21⁄4 41⁄2 390,000 292,500 10,969 5,484
21⁄2 4 480,000 360,000 15,000 7,500
23⁄4 4 517,650 388,238 17,794 8,897
3 4 626,850 470,138 23,507 11,753
31⁄4 4 745,500 559,125 30,286 15,143
31⁄2 4 874,650 655,988 38,266 19,133
33⁄4 4 1,014,300 760,725 47,545 23,773
4 4 1,163,400 872,550 58,100 29,085
* SAE J429 grade 8 bolts do not exceed 1-1/2″ diameter.