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Size
8-32
2.0
10-24
3.2
10-32
3.6
12-24
5.0
1/4-20
7.6
1/4-28
8.6
5/16-18
15.5
5/16-24
17.1
3/8-16
27
3/8-24
31
7/16-14
43
7/16-20
49
1/2-13
66
1/2-20
75
9/16-12
96
9/16-18
107
5/8-11
133
5/8-18
150
3/4-10
3/4-16
1-8
1-12
Size (mm)
Mxxx-04xxx-xx
Mxxx-05xxx-xx
Mxxx-06xxx-xx
Mxxx-08xxx-xx
Mxxx-08xxx-xxF
Mxxx-10xxx-xx
Mxxx-10xxx-xxF
Mxxx-12xxx-xx
Mxxx-12xxx-xxF
Mxxx-14xxx-xx
Mxxx-14xxx-xxF
Mxxx-16xxx-xx
135
Mxxx-16xxx-xxF
145
Mxxx-18xxx-xx
187
Mxxx-18xxx-xxF
210
Mxxx-20xxx-xx
264
Mxxx-20xxx-xxF
293
Mxxx-22xxx-xx
360
Mxxx-22xxx-xxF
396
Mxxx-24xxx-xx
457
Mxxx-24xxx-xxF
498
Mxxx-27xxx-xx
Mxxx-27xxx-xxF
Mxxx-30xxx-xx
Notes:
1.
The torque values above are general guidelines. Always use the torque values specified in the service manuals and/or
assembly drawings when they differ from the above torque values.
2.
The torque values above are based on new plated threads. Increase torque values by 15% if non-plated threads are
used.
3.
At minimum, hardware threaded into aluminum must have two diameters of thread engagement. Hardware threaded
into steel and cast iron must have 1.25 diameters of thread.
4.
Torque values are calculated as equivalent stress loading on American hardware with an approximate preload of 75%
of proof strength and a friction coefficient of 0.2.
TP-7173
10/20
American Standard Fasteners Torque Specifications
Assembled into Cast Iron or Steel
Grade 2
Nm
(18 in. lb.)
3.1
Nm
(28 in. lb.)
4.9
Nm
(32 in. lb.)
5.5
Nm
(44 in. lb.)
7.7
Nm
(67 in. lb.)
11.6
Nm
(76 in. lb.)
13.2
Nm
(137 in. lb.)
24.0
Nm
(151 in. lb.)
26.4
Nm
(243 in. lb.)
42
Nm
(274 in. lb.)
47
Nm
(32 ft. lb.)
68
Nm
(36 ft. lb.)
76
Nm
(49 ft. lb.)
103
Nm
(55 ft. lb.)
117
Nm
(71 ft. lb.)
149
Nm
(79 ft. lb.)
165
Nm
(98 ft. lb.)
206
Nm
(111 ft. lb.)
232
-
365
-
405
-
881
-
961
Metric Fasteners Torque Specifications, Measured in Nm (ft. lb.)
Assemblies into Cast Iron or Steel
Grade 5.8
Grade 8.8
1.9
(1.4)
2.9
3.8
(2.8)
5.8
6.5
(4.8)
10.4
16
(12)
25
17
(13)
27
31
(23)
50
33
(24)
53
55
(40)
87
60
(44)
95
87
(64)
135
94
(69)
151
(100)
217
(107)
231
(138)
299
(155)
336
(195)
423
(216)
469
(266)
576
(292)
633
(337)
731
(367)
797
-
1072
-
1156
-
1453
Appendix C.
Grade 5
Nm
(27 in. lb.)
Nm
(43 in. lb.)
Nm
(49 in. lb.)
Nm
(68 in. lb.)
Nm
(103 in. lb.)
16.5
Nm
(117 in. lb.)
18.8
Nm
(212 in. lb.)
33.9
Nm
(234 in. lb.)
40
Nm
(31 ft. lb.)
60
Nm
(35 ft. lb.)
68
Nm
(50 ft. lb.)
96
Nm
(56 ft. lb.)
107
Nm
(76 ft. lb.)
146
Nm
(86 ft. lb.)
164
Nm
(110 ft. lb.)
210
Nm
(122 ft. lb.)
235
Nm
(152 ft. lb.)
290
Nm
(171 ft. lb.)
328
Nm
(269 ft. lb.)
515
Nm
(299 ft. lb.)
572
Nm
(650 ft. lb.)
1245
Nm
(709 ft. lb.)
1357
Grade 10.9
(2.1)
4.3
(3.2)
(4.3)
8.5
(6.3)
(7.7)
14.7
(11)
(17)
36
(26)
(20)
38
(28)
(37)
70
(52)
(39)
74
(55)
(64)
123
(91)
(70)
134
(99)
(103)
196
(145)
(111)
212
(156)
(160)
305
(225)
(171)
325
(240)
(221)
421
(310)
(248)
473
(349)
(312)
595
(439)
(346)
660
(487)
(425)
811
(598)
(467)
890
(657)
(539)
1028
(758)
(588)
1121
(827)
(790)
1507
(1112)
(853)
1626
(1199)
(1072)
2043
(1507)
Torque Specifications
Assembled
into Aluminum
Grade 8
-
-
-
-
Nm
(146 in. lb.)
Nm
(166 in. lb.)
Nm
(300 in. lb.)
Nm
(28 ft. lb.)
Nm
(44 ft. lb.)
Nm
(50 ft. lb.)
Nm
(71 ft. lb.)
See Note 3
Nm
(79 ft. lb.)
Nm
(108 ft. lb.)
Nm
(121 ft. lb.)
Nm
(155 ft. lb.)
Nm
(173 ft. lb.)
Nm
(214 ft. lb.)
Nm
(242 ft. lb.)
Nm
(380 ft. lb.)
Nm
(422 ft. lb.)
Nm
(918 ft. lb.)
Nm
(1001 ft. lb.)
Assembled into
Aluminum
Grade 12.9
4.3
(3.2)
8.5
(6.3)
17.6
(13)
43
(31)
46
(34)
85
(62)
89
(66)
147
(109)
161
(119)
236
(174)
254
(188)
365
(270)
See Note 3
390
(288)
505
(373)
567
(419)
714
(526)
792
(584)
973
(718)
1068
(788)
1233
(910)
1345
(992)
1809
(1334)
1952
(1439)
2452
(1809)
51
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