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T O R Q U E S P E C I F I C A T I O N S
AMERICAN
Bolt Head Markings
SAE Grade 2
(No Dashes)
SAE Grade 5
(3 Dashes)
Wrench
Size "A"
SAE Grade 8
(6 Dashes)
METRIC
Wrench
Size "A"
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.
38
Proper torque for American fasteners used on manufactured implement.
Recommended Torque in Foot Pounds (Newton Meters).*
WRENCH
BOLT DIAMETER
SIZE(IN.)"A"
(IN.)"B" AND
THREAD SIZE
7/16
1/4 -20 UNC
7/16
1/4 - 24 UNF
1/2
5/16 -18 UNC
1/2
5/16 - 24 UNF
9/16
3/8 - 16 UNC
9/16
3/8 -24 UNF
5/8
7/16 -14 UNC
5/8
7/16 - 20 UNF
3/4
1/2 - 13 UNC
3/4
1/2 - 20 UNF
7/8
9/16 -12 UNC
7/8
9/16 - 18 UNF
15/16
5/8 - 11 UNC
15/16
5/8 - 18 UNF
1-1/8
3/4 - 10 UNC
1-1/8
3/4 - 16 UNF
1-5/16
7/8 - 9 UNC
1-5/16
7/8 - 14 UNF
1-1/2
1-1/2
1-1/2
1-11/16
1-1/8 - 7 UNC
1-11/16
1-1/8 -12 UNF
1-7/8
1-1/4 - 7 UNC
1-7/8
1-1/4 - 12 UNF
2-1/16
1-3/8 - 6 UNC
2-1/16
1-3/8 -12 UNF
2-1/4
1-1/2 - 6 UNC
2-1/4
1-1/2 - 12 UNF
Proper torque for metric fasteners used on manufacturer implement.
Recommended Torque in Foot Pounds (Newton Meters).*
WRENCH SIZE
BOLT DIA.
(mm) "A"
(mm) "B"
8
5
10
6
13
8
16
10
18
12
21
14
24
16
30
20
33
22
36
24
31
27
46
30
SAE
GRADE 2
6 (7)
6 (8)
11 (15)
13 (17)
20 (27)
23 (31)
32 (43)
36 (49)
49 (66)
55 (75)
70 (95)
79 (107)
97 (131)
110 (149)
144(195)
192 (260)
166 (225)
184 (249)
1-8 UNC
250 (339)
1 - 12 UNF
274 (371)
1-14 UNF
280 (379)
354 (480)
397 (538)
500 (678)
553 (749)
655 (887)
746 (1011)
870 (1179)
979 (1327)
ASTM
ASTM
4.6
8.8
1.8 (2.4)
3 (4)
7.3 (10)
14.5 (20)
25 (34)
74 (100)
40 (54)
118 (160)
62 (84)
167 (226)
122 (165)
325 (440)
443 (600)
211 (286)
563 (763)
821 (1112)
418 (566)
1119 (1516)
SAE
SAE
GRADE 5
GRADE 8
8 (11)
12 (16)
10 (13)
14 (18)
17 (23)
25 (33)
19 (26)
27 (37)
31 (42)
44 (60)
35 (47)
49 (66)
49 (66)
70 (95)
55 (75)
78 (106)
76 (103)
106 (144)
85 (115)
120 (163)
109 (148)
153 (207)
122 (165)
172 (233)
150 (203)
212 (287)
170 (230)
240 (325)
266 (360)
376 (509)
297 (406)
420 (569)
430 (583)
606 (821)
474 (642)
668 (905)
644 (873)
909 (1232)
705 (955)
995 (1348)
721 (977)
1019 (1381)
795 (1077)
1288 (1745)
890 (1206)
1444 (1957)
1120 (1518)
1817 (2462)
1241 (1682)
2013 (2728)
1470 (1992)
2382 (3228)
1672 (2266)
2712 (3675)
1950 (2642)
3161 (4283)
2194 (2973)
3557 (4820)
ASTM
ASTM
9.8
10.9
5.1 (6.9)
6.5 (8.8)
8.7 (12)
11.1 (15)
21.1 (29)
27 (37)
42 (57)
53 (72)
73 (99)
93 (126)
116 (157)
148 (201)
181 (245)
230 (312)
449 (608)
611 (828)
778 (1054)
138(1542)
1547(2096)
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