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METRIC FLANGED HARDWARE
NOM.
CLASS 8.8 BOLT and
SIZE
CLASS 8 NUT
UNPLATED
2.4 N·m (21 lb
M4
in)
4.9 N·m (43 lb
M5
in)
8.3 N·m (73 lb
M6
in)
20 N·m (179 lb
M8
in)
M10
40 N·m (30 lb ft)
70 N·m (52 lb ft)
M12
174 N·m (128 lb
M16
ft)
350 N·m (259 lb
M20
ft)
607 N·m (447 lb
M24
ft)
IDENTIFICATION
Metric Hex head and carriage bolts, classes
5.6 and up
1. Manufacturer's Identification
2. Property Class
Metric Hex nuts and locknuts, classes 05 and
up
1. Manufacturer's Identification
2. Property Class
3. Clock Marking of Property Class and Manufacturer's
Identification (Optional), i.e. marks 60° apart indicate
Class 10 properties, and marks 120° apart indicate
Class 8.
INTRODUCTION
CLASS 10.9 BOLT and
PLATED
UNPLATED
W/ZnCr
3.2 N·m (28 lb
3.5 N·m (31 lb
in)
6.5 N·m (58 lb
7.0 N·m (62 lb
in)
11 N·m (96 lb
12 N·m (105 lb
in)
27 N·m (240 lb
29 N·m (257 lb
in)
54 N·m (40 lb
57 N·m (42 lb ft)
ft)
93 N·m (69 lb
100 N·m (74 lb
ft)
231 N·m (171 lb
248 N·m (183 lb
ft)
467 N·m (345 lb
484 N·m (357 lb
ft)
809 N·m (597 lb
838 N·m (618 lb
ft)
48126536 05/04/2017
CLASS 10 NUT
PLATED
W/ZnCr
4.6 N·m (41 lb
in)
in)
9.4 N·m (83 lb
in)
in)
16 N·m (141 lb
in)
in)
39 N·m (343 lb
in)
in)
77 N·m (56 lb
ft)
134 N·m (98 lb
ft)
ft)
331 N·m (244 lb
ft)
ft)
645 N·m (476 lb
ft)
ft)
1118 N·m
ft)
(824 lb ft)
30
LOCKNUT
LOCKNUT
CL.8
CL.10
W/CL8.8
W/CL10.9
BOLT
BOLT
2.2 N·m (19 lb
3.1 N·m (27 lb
in)
in)
4.4 N·m (39 lb
6.4 N·m (57 lb
in)
in)
7.5 N·m (66 lb
11 N·m (96 lb
in)
in)
18 N·m (163 lb
27 N·m (240 lb
in)
in)
37 N·m (27 lb ft) 53 N·m (39 lb ft)
63 N·m (47 lb ft) 91 N·m (67 lb ft)
158 N·m (116 lb
226 N·m (167 lb
ft)
ft)
318 N·m (235 lb
440 N·m (325 lb
ft)
ft)
552 N·m (407 lb
ft)
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