29
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 specified torque value for
plated fasteners. Use 85% of the specified
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)
Wrench
Size “A”
Bolt
Diameter “B”
Bolt
Diameter “B”
TORQUE SPECIFICATIONS
