INTRODUCTION RT540E SERVICE MANUAL
1-12 Published 4-20-2015, Control # 502-01
To convert pounds-inch (lb-in) of torque to Newton meters
(Nm), multiply the pounds-inch quantity by 0.11298.
Torque Values
The following tables list the torque values for both ASME
standard and metric fasteners. The tables list the values for
grade 5 and grade 8 zinc-flake coated, untreated (black)
finish and stainless steel fasteners.
Table 1-3: UNC (Coarse) Thread: Torque Values for Zinc-Flake Coated and Untreated Fasteners
NOTE: Studs shall be torqued using capscrew values when grade is known.
Table 1-4: UNF (Fine) Thread: Torque Values for Zinc-Flake Coated and Untreated Fasteners
NOTE: Studs shall be torqued using capscrew values when grade is known.
Bolt Diameter - Inches
Torque Values (Pounds-Foot, Maximum/Minimum)
SAE Grade 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-1/2
Zinc-Flake
5 7 14 25 40 61 88 121 213 342 512 636 884 1532
8 10 20 36 57 86 124 171 301 483 723 1032 1433 2488
Untreated
5
9.0
7.7
19
17
32
30
52
48
78
72
114
106
156
144
270
249
416
384
606
560
813
751
1141
1053
2028
1865
8
12.5
11.5
26
24
48
44
73
67
120
110
161
143
234
216
385
355
615
567
929
857
1342
1234
2043
1885
3276
3024
Bolt Diameter - Inches
Torque Values (Pounds-Foot, Maximum/Minimum)
SAE Grade 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-1/2
Zinc-Flake
5 8 15 28 44 66 95 132 229 364 543 785 944 1654
8 11 22 39 61 94 134 186 323 514 766 1109 1530 2682
Untreated
5
10
9
21
19
36
34
57
53
88
81
126
116
182
167
312
287
458
421
658
606
882
814
1251
1155
2288
2105
8
14.5
13.5
26
24
53
49
85
79
125
115
177
163
250
230
425
393
672
620
1009
931
1500
1380
2092
1925
3640
3360
SAE Grade 1
and Grade 2
HHCS
SAE Grade 5
HHCS
SAE Grade 7
HHCS
SAE Grade 8
HHCS
Serrated
Flange Head
Socket Head
Shoulder
Screw
Socket Head
Capscrew
FIGURE 1-4
Reference Only