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AMERICAN
Bolt Head Markings
SAE Grade 2
(No Dashes)
SAE Grade 5
(3 Dashes)
Wrench
SAE Grade 8
Size "A"
(6 Dashes)
METRIC
Wrench
Size "A"
8.8
Numbers appearing on bolt heads
indicate ASTM class.
*Use 75% of the specified torque value for plated
fasteners. Use 85% of the specified torque
values for lubricated fasteners.
TORQUE SPECIFICATIONS
Proper toque for American fasteners used on Bush Hog equipment.
Recommended Torque in Foot Pounds (Newton Meters).*
BOLT DIAMETER
WRENCH
SIZE (IN.) "A"
7/16
1/4 - 2O UNC
7/16
1/4 - 28 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
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 Bush Hog equipment.
Recommended torque in foot pounds (newton Meters).*
WRENCH
SIZE
(mm) "A"
8
10
13
16
18
21
24
30
33
36
41
46
(IN.) "B" AND
SAE
THREAD SIZE
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)
7/8 - 9 UNC
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)
BOLT
DIA.
ASTM
(mm) "B"
4.6
5
1.8 (2.4)
6
3 (4)
8
7.3 (10)
10
14.5 (20)
12
25 (34)
14
40 (54)
16
62 (84)
20
122 (165)
22
24
211 (286)
27
30
418 (566)
17
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 (402)
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
8.8
9.8
5.1 (6.9)
8.7 (12)
21.1 (29)
42 (57)
74 (100)
73 (99)
118 (160)
116 (157)
167 (226)
181 (245)
325 (440)
443 (600)
563 (763)
778 (1054)
821 (1112)
1138 (1542)
1119 (1516)
1547 (2096)
SAE
ASTM
10.9
6.5 (8.8)
11.1 (15)
27 (37)
53 (72)
93 (126)
148 (201)
230 (312)
449 (608)
611 (828)
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