Chapter 5 General Reference 121
FINE THREAD TORQUE CHART (METRIC)
TIGHTENING TORQUE
SAE J429
GRADE 5
SAE J429
GRADE 8
SIZE
(DIA-TPI)
BOLT DIA.
(INCHES) PLAIN (KG-
M)
PLATED
(KG-M)
PLAIN
(KG-M)
PLATED
(KG-M)
5/16-24 0.3125 3 2 4 3
3/8-24 0.375 5 4 7 5
7/16-20 0.4375 8 6 11 8
1/2-20 0.5 12 9 17 12
9/16-18 0.5625 17 12 24 18
5/8-18 0.625 24 18 33 25
3/4-16 0.75 41 31 58 44
7/8-11 0.875 62 45 93 69
1-12 1 89 67 138 103
1 1/8-12 1.125 123 93 200 150
1 1/4-12 1.25 171 129 278 209
1 3/8-12 1.375 232 174 375 281
1 1/2-12 1.5 304 228 492 369
COARSE THREAD TORQUE CHART (METRIC)
TIGHTENING TORQUE
SAE J429
GRADE 5
SAE J429
GRADE 8
SIZE
(DIA-TPI)
BOLT DIA.
(INCHES) PLAIN (KG-
M)
PLATED
(KG-M)
PLAIN
(KG-M)
PLATED
(KG-M)
5/16-18 0.3125 2 2 3 2
3/8-16 0.375 4 3 6 5
7/16-14 0.4375 7 5 10 7
1/2-13 0.5 10 8 15 11
9/16-12 0.5625 15 11 21 16
5/8-11 0.625 21 16 30 22
3/4-10 0.75 37 28 52 39
7/8-9 0.875 55 41 84 63
1-8 1 82 62 126 94
1 1/8-7 1.125 110 82 178 133
1 1/4-7 1.25 155 116 251 188
1 3/8-6 1.375 203 152 329 246
1 1/2-6 1.5 270 210 438 328
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