Freightliner M915 / M916 -
Installation Manual P/N 0257550622-00
Crew Protection Kit
(Doc No.: II113500-1 D)
6. Fasteners
This chapter assists in identification and selection of the required fasteners used during the
installation procedure.
6.1 Definitions of Maximal Initial Torque
Basic Assumptions:
All fasteners are zinc plated @ 0.125 Friction Coefficient
All fasteners are HEX head @ Grade 8
Table 6-1. Recommended Maximum Torque Values
Diameter
Thread
Grade 8 Torque-
ft-lb
N-m
3/16" (5 mm)
NC
3
4
NF
3
4
1/4"
NC
9
12
NF
10
14
5/16"
NC
18
24
NF
20
27
3/8"
NC
35
47
NF
35
47
7/16"
NC
55
75
NF
60
81
1/2"
NC
80
108
NF
90
122
9/16
NC
110
149
NF
130
176
5/8"
NC
170
231
NF
180
244
3/4"
NC
280
380
NF
320
434
7/8"
NC
460
624
NF
500
678
1"
NC
680
922
NF
740
1,003