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TORQUE SPECIFICATIONS
Proper torque for American fasteners used on manufactured implement.
Recommended Torque in Foot Pounds (Newton Meters).*
AMERICAN
Bolt Head Markings
SAE Grade 2
(No Dashes)
SAE Grade 8
(6 Dashes)
Wrench
Size “A”
SAE Grade 5
(3 Dashes)
METRIC
Numbers appearing on bolt heads
indicate ASTM classes.
*Use 75% of the specifi ed torque value for
plated fasteners. Use 85% of the specifi ed
torque values for lubricated fasteners.
Proper torque for metric fasteners used on manufacturer implement.
Recommended Torque in Foot Pounds (Newton Meters).*
WRENCH
SIZE(IN.)”A”
BOLT DIAMETER
(IN.)”B” AND
THREAD SIZE
SAE
GRADE 2
SAE
GRADE 5
SAE
GRADE 8
7/16 1/4 -20 UNC 6 (7) 8 (11) 12 (16)
7/16 1/4 - 24 UNF 6 (8) 10 (13) 14 (18)
1/2 5/16 -18 UNC 11 (15) 17 (23) 25 (33)
1/2 5/16 - 24 UNF 13 (17) 19 (26) 27 (37)
9/16 3/8 - 16 UNC 20 (27) 31 (42) 44 (60)
9/16 3/8 -24 UNF 23 (31) 35 (47) 49 (66)
5/8 7/16 -14 UNC 32 (43) 49 (66) 70 (95)
5/8 7/16 - 20 UNF 36 (49) 55 (75) 78 (106)
3/4 1/2 - 13 UNC 49 (66) 76 (103) 106 (144)
3/4 1/2 - 20 UNF 55 (75) 85 (115) 120 (163)
7/8 9/16 -12 UNC 70 (95) 109 (148) 153 (207)
7/8 9/16 - 18 UNF 79 (107) 122 (165) 172 (233)
15/16 5/8 - 11 UNC 97 (131) 150 (203) 212 (287)
15/16 5/8 - 18 UNF 110 (149) 170 (230) 240 (325)
1-1/8 3/4 - 10 UNC 144(195) 266 (360) 376 (509)
1-1/8 3/4 - 16 UNF 192 (260) 297 (406) 420 (569)
1-5/16 7/8 - 9 UNC 166 (225) 430 (583) 606 (821)
1-5/16 7/8 - 14 UNF 184 (249) 474 (642) 668 (905)
1-1/2 1-8 UNC 250 (339) 644 (873) 909 (1232)
1-1/2 1 - 12 UNF 274 (371) 705 (955) 995 (1348)
1-1/2 1-14 UNF 280 (379) 721 (977) 1019 (1381)
1-11/16 1-1/8 - 7 UNC 354 (480) 795 (1077) 1288 (1745)
1-11/16 1-1/8 -12 UNF 397 (538) 890 (1206) 1444 (1957)
1-7/8 1-1/4 - 7 UNC 500 (678) 1120 (1518) 1817 (2462)
1-7/8 1-1/4 - 12 UNF 553 (749) 1241 (1682) 2013 (2728)
2-1/16 1-3/8 - 6 UNC 655 (887) 1470 (1992) 2382 (3228)
2-1/16 1-3/8 -12 UNF 746 (1011) 1672 (2266) 2712 (3675)
2-1/4
2-1/4
1-1/2 - 6 UNC
1-1/2 - 12 UNF
870 (1179)
979 (1327)
1950 (2642)
2194 (2973)
3161 (4283)
3557 (4820)
WRENCH SIZE
(mm) “A”
BOLT DIA.
(mm) ”B”
ASTM
4.6
ASTM
8.8
ASTM
9.8
ASTM
10.9
8 5 1.8 (2.4) 5.1 (6.9) 6.5 (8.8)
10 6 3 (4) 8.7 (12) 11.1 (15)
13 8 7.3 (10) 21.1 (29) 27 (37)
16 10 14.5 (20) 42 (57) 53 (72)
18 12 25 (34) 74 (100) 73 (99) 93 (126)
21 14 40 (54) 118 (160) 116 (157) 148 (201)
24 16 62 (84) 167 (226) 181 (245) 230 (312)
30 20 122 (165) 325 (440) 449 (608)
33 22 443 (600) 611 (828)
36 24 211 (286) 563 (763) 778 (1054)
31 27 821 (1112) 138(1542)
46 30 418 (566) 1119 (1516) 1547(2096)
34 Torque Specifi cations
Wrench
Size “A”
Bolt
Diameter “B”
Bolt
Diameter “B”