Tightening Torque Data

ASTM A307

Bolt SizeTPIProof Load (lbs)Clamp Load (lbs)Tightening Torque (ft lbs)
Galv+WaxedGalvPlain
1⁄4201,053790243
5⁄16181,7351,302387
3⁄8162,5671,92561512
7⁄16143,5212,640102419
1⁄2134,7003,525153729
9⁄16126,0284,521215342
5⁄8117,4855,614297358
3⁄41011,0628,29752130104
7⁄8915,30111,47684209167
1820,07115,053125314251
11⁄8725,27118,953178444355
11⁄4732,09324,070251627501
13⁄8638,25428,690329822657
11⁄2646,53434,9004361,091873
13⁄4562,92847,1966881,7211,377
241⁄282,80062,1001,0352,5882,070
21⁄441⁄2107,64080,7301,5143,7843,027
21⁄24132,48099,3602,0705,1254,140
23⁄44163,282122,4612,8067,0165,613
34197,726148,2953,7079,2687,415
31⁄44235,152176,3644,77711,9419,553
31⁄24275,890206,9176,03515,08812,070
33⁄44319,939239,9547,49918,74614,997
44366,970275,2279,17422,93618,348

SAE Grade 2

Bolt SizeTPIProof Load (lbs) Clamp Load (lbs) Tightening Torque (ft lbs)
Galv+WaxedGalvPlain
1⁄4201,7501,313375
5⁄16182,9002,17561411
3⁄8164,2503,188102520
7⁄16145,8504,388164032
1⁄2137,8005,850246149
9⁄161210,0007,500358870
5⁄81112,4009,3004812197
3⁄41018,40013,80086216173
7⁄8915,20011,40083208166
1820,00015,000125313250
11⁄8725,20018,900177443354
11⁄4732,00024,000250625500
13⁄8638,10028,575327819655
11⁄2646,40034,8004351,088870

ASTM A325

Bolt SizeTPITensionTightening Torque Range (ft lbs) (Min – Max)
MinMaxGalv+WaxedPlain
1⁄21312,00014,00050 – 58100 – 117
5⁄81119,00023,00099 – 120198 – 240
3⁄41028,00034,000175 – 213350 – 425
7⁄8939,00047,000284 – 343569 – 685
1851,00061,000425 – 508850 – 1,017
11⁄8764,00077,000600 – 7221,200 – 1,444
11⁄4781,00098,000844 – 1,0211,687 – 2,042
13⁄8697,000117,0001,111 – 1,3412,223 – 2,681
11⁄26118,000143,0001,475 – 1,7882,950 – 3,575

ASTM A449 / SAE Grade 5

Bolt SizeTPIProof Load (lbs) Clamp Load (lbs) Tightening Torque (ft lbs)
Galv+WaxedGalvPlain
1⁄4202,7002,0254118
5⁄16184,4503,33892217
3⁄8166,6004,950153931
7⁄16149,0506,788256249
1⁄21312,0509,038389475
9⁄161215,45011,58854136109
5⁄81119,20014,40075188150
3⁄41028,40021,300133333266
7⁄8939,25029,438215537429
1851,50038,625322805644
11⁄8756,45042,338397992794
11⁄4771,70053,7755601,4001,120
13⁄8685,45064,0887341,8361,469
11⁄26104,00078,0009752,4381,950
13⁄45104,50078,3751,1432,8572,286
241⁄2137,500103,1251,7194,2973,438
21⁄441⁄2178,750134,0632,5146,2845,027
21⁄24220,000165,0003,4388,5946,875
23⁄44271,150203,3634,66011,6519,321
34328,350246,2636,15715,39112,313
* SAE J429 grade 5 bolts do not exceed 1-1/2″ diameter.

ASTM A193 B7 / ASTM A320 L7 / ASTM A354 BC

Bolt SizeTPIProof Load (lbs) Clamp Load (lbs) Tightening Torque (ft lbs)
Galv+WaxedGalvPlain
1⁄4203,3502,51351310
5⁄16185,5004,125112721
3⁄8168,1506,113194838
7⁄161411,1508,363307661
1⁄21314,90011,1754711693
9⁄161219,10014,32567168134
5⁄81123,75017,81393232186
3⁄41035,05026,288164411329
7⁄8948,50036,375265663530
1863,65047,738398995796
11⁄8780,10060,0755631,4081,126
11⁄8882,93462,2015831,4581,166
11⁄47101,75076,3137951,9871,590
11⁄48105,00678,7548202,0511,641
13⁄86121,30090,9751,0422,6062,085
13⁄88129,49297,1191,1132,7822,226
11⁄26147,550110,6631,3833,4582,767
11⁄28156,687117,5151,4693,6722,938
13⁄45199,500149,6252,1825,4554,364
13⁄48218,400163,800––4,778
241⁄2262,500196,8753,2818,2036,563
28290,850218,138––7,271
21⁄441⁄2341,250255,9384,79911,9979,598
21⁄48373,801280,351––10,513
21⁄24420,000315,0006,56316,40613,125
21⁄28466,200349,650––14,569
23⁄44468,500351,2638,05020,12416,100
23⁄48515,851386,888––17,732
34567,150425,36310,63426,58521,268
38618,451463,838––23,192
31⁄44674,500505,87513,70134,25227,402
31⁄48730,550547,913––29,679
31⁄24791,350593,51317,31143,27734,622
31⁄28851,201638,401––37,240
33⁄4491770068827521,50953,77143,017
33⁄48982,300736,725––46,045
44105260078945026,31565,78852,630
481,121,950841,463––56,098

ASTM A490

Bolt SizeTPITension (lbs)Tightening Torque Range (ft lbs) (Min – Max)
MinMaxPlainLubricated
1⁄21315,00018,000125 – 15063 – 75
5⁄81124,00029,000250 – 302125 – 151
3⁄41035,00042,000438 – 525219 – 263
7⁄8949,00059,000715 – 860357 – 430
1864,00077,0001,067 – 1,283533 – 642
11⁄8780,00096,0001,500 – 1,800750 – 900
11⁄47102,000122,0002,125 – 2,5421,063 – 1,271
13⁄86121,000145,0002,773 – 3,3231,386 – 1,661
11⁄26148,000178,0003,700 – 4,4501,850 – 2,225

ASTM A354-BD / SAE Grade 8

Bolt SizeTPIProof Load (lbs) Clamp Load (lbs) Tightening Torque (ft lbs)
PlainLubricated
1⁄4203,8002,850126
5⁄16186,3004,7252512
3⁄8169,3006,9754422
7⁄161412,7509,5637035
1⁄21317,05012,78810753
9⁄161221,85016,38815477
5⁄81127,10020,325212106
3⁄41040,10030,075376188
7⁄8955,45041,588606303
1872,70054,525909454
11⁄8791,55068,6631,287644
11⁄47120,00090,0001,875938
13⁄86138,600103,9502,3821,191
11⁄26168,600126,4503,1611,581
13⁄45228,000171,0004,9882,494
241⁄2300,000225,0007,5003,750
21⁄441⁄2390,000292,50010,9695,484
21⁄24480,000360,00015,0007,500
23⁄44517,650388,23817,7948,897
34626,850470,13823,50711,753
31⁄44745,500559,12530,28615,143
31⁄24874,650655,98838,26619,133
33⁄441,014,300760,72547,54523,773
441,163,400872,55058,10029,085
* SAE J429 grade 8 bolts do not exceed 1-1/2″ diameter.