Page 5
Mcro 19 - Servce & Parts Manual
November 2019
Bolt Torque Specification - American Standard
Fasteners
Use the following values to apply torque unless a specific torque value is called out for the part being
used.
American Standard Cap Screws
SAE Grade
5
8
Cap Screw
Size (inches)
Torque
Torque
Ft������
Lbs
Nm
Ft������
Lbs
Nm
Min
Max
Min
Max
Min
Max
Min
Max
1/4 - 20
6.25
7.25
8.5
10
8.25
9.5
11
13
1/4 - 28
8
9
11
12
10.5
12
14
16
5/16 - 18
14
15
19
20
18.5
20
25
27
5/16 - 24
17.5
19
12
26
23
25
31
34
3/8 - 16
26
28
35
38
35
37
47.5
50
3/8 - 24
31
34
42
46
41
45
55.5
61
7/16- 14
41
45
55.5
61
55
60
74.5
81
7/16 - 20
51
55
69
74.5
68
75
92
102
1/2 - 13
65
72
88
97.5
86
96
116
130
1/2 - 20
76
84
103
114
102
112
138
152
9/16 - 12
95
105
129
142
127
140
172
190
9/16 - 18
111
123
150
167
148
164
200
222
5/8 - 11
126
139
171
188
168
185
228
251
5/8 - 18
152
168
206
228
203
224
275
304
3/4 - 10
238
262
322
255
318
350
431
474
3/4 - 16
274
302
371
409
365
402
495
544
7/8 - 9
350
386
474
523
466
515
631
698
7/8 - 14
407
448
551
607
543
597
736
809
1- 8
537
592
728
802
716
790
970
1070
1 - 14
670
740
908
1003
894
987
1211
1137
Torque values apply to fasteners as received from the supplier, dry or when lubricated with
normal engine oil������
If special graphite grease, molydisulphide grease, or other extreme pressure lubricants are
used, these torque values do not apply������
Secton 4 - Torque Specfcatons
Bolt Torque Specification - American Standard
