K-Line Ag © ___________________________________________________________________
Bolt Torque table
Bolt Torque Table Estimated with clamp load as 75% of proof load as specified in SAE J429 and ASME 574
Socket Head Cap Screws
SAE 5
SAE 8
Steel Grade
Minimum Tensile Strength PSI
1/4-1/2" 180,000 5/8-1" 170,000
120,000
150,000
Nominal Dia. and Thread Pitch
Bolt Torque Specs in Foot Pounds or (Inch Pounds)
Dry
Lubed
Dry
Lubed
Dry
Lubed
1/4-20
(101)
(76)
(143)
(107)
(168)
(120)
1/4-28
(116)
(87)
(147)
(123)
(192)
(144)
5/16-18
(209)
(157)
(295)
(221)
(348)
(264)
5/16-24
(231)
(174)
(327)
(245)
(384)
(288)
3/8-16
(372)
(276)
44
33
51
38
3/8-24
(420)
(312)
49
37
58
43
7/16-14
49
37
70
52
81
61
7/16-20
55
41
78
58
91
68
1/2-13
75
57
106
80
124
93
1/2-20
85
64
120
90
140
105
5/8-11
150
113
212
159
238
179
5/8-18
170
127
240
180
270
202
3/4-10
267
200
376
282
423
317
3/4-16
297
223
420
315
472
354
7/8-9
429
322
606
455
682
511
7/8-14
474
355
669
502
752
564
1-8
644
483
909
681
1022
767
1-12 860 Lubed means cleaned dry bolts lubricated with a standard medium viscosity machine oil. Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method. Thread Engagement 722 542 1020 765 1147
Figure 47
Page | 35
Made with FlippingBook - Online Brochure Maker