INTRODUCTION
INCH FLANGED HARDWARE
NOM-
INAL
SIZE
SAE GRADE 5 BOLT and
NUT
SAE GRADE 8 BOLT and
NUT
LOCKNUT
GrF W/ Gr5
BOLT
LOCKNUT
GrG W/ Gr8
BOLT
UNPLATED
or PLATED
SILVER
PLATED
W/ZnCr
GOLD
UNPLATED
or PLATED
SILVER
PLATED
W/ZnCr
GOLD
1/4
9 N·m (80 lb in)
12 N·m (106 lb
in)
13 N· m (115 lb
in)
17 N·m (150 lb
in)
8 N·m (71 lb in)
12 N·m (106 lb
in)
5/16
19 N·m (168 lb
in)
25 N·m (221 lb
in)
26 N· m (230 lb
in)
35 N·m (310 lb
in)
17 N·m (150 lb
in)
24 N·m (212 lb
in)
3/8
33 N·m (25 lb ft)
44 N· m (33 lb
ft)
47 N·m (35 lb
ft)
63 N·m (46 lb
ft)
30 N·m (22 lb ft) 43 N· m (32 lb ft)
7/16
53 N·m (39 lb ft)
71 N· m (52 lb
ft)
75 N·m (55 lb
ft)
100 N· m (74 lb
ft)
48 N·m (35 lb ft) 68 N· m (50 lb ft)
1/2
81 N·m (60 lb ft)
108 N·m (80 lb
ft)
115 N·m (85 lb
ft)
153 N· m (113
lb ft)
74 N·m (55 lb ft)
104 N·m (77 lb
ft)
9/16
117 N· m (86 lb
ft)
156 N·m (115
lb ft)
165 N·m (122
lb ft)
221 N·m (163
lb ft)
106 N·m (78 lb ft)
157 N· m (116 lb
ft)
5/8
162 N·m (119 lb
ft)
216 N·m (159
lb ft)
228 N·m (168
lb ft)
304 N·m (225
lb ft)
147 N· m (108 lb
ft)
207 N· m (153 lb
ft)
3/4
287 N· m (212 lb
ft)
383 N·m (282
lb ft)
405 N·m (299
lb ft)
541 N·m (399
lb ft)
261 N· m (193 lb
ft)
369 N· m (272 lb
ft)
7/8
462 N· m (341 lb
ft)
617 N·m (455
lb ft)
653 N·m (482
lb ft)
871 N·m (642
lb ft)
421 N·m (311 lb
ft)
594 N· m (438 lb
ft)
1
693 N· m (512 lb
ft)
925 N·m (682
lb ft)
979 N·m (722
lb ft)
1305 N·m (963
lb ft)
631 N· m (465 lb
ft)
890 N· m (656 lb
ft)
IDENTIFICATION
Inch Bolts and free-spinning nuts
20083682
3
Grade Marking Examples
SAE Grade Identication
1 Grade 2 - No Marks 4 Grade 2 Nut - No Marks
2
Grade 5 - Three Marks
5
Grade 5 Nut - Marks 120 ° Apart
3
Grade 8 - Five Marks
6
Grade 8 Nut - Marks 60 ° Apart
47506838 04/04/2013
14