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Ontario Rodding Community -> Transmission, clutch, Differential, drive shaft, Steering, Suspension, wheels, tires, brakes -> Basic Bolt Torque Spec's
Post Info TOPIC: Basic Bolt Torque Spec's
Grumpy50


Hensall Ont Member

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Posts: 90
Date:
Basic Bolt Torque Spec's
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                        Ran into a issue this morning with an employee repairing his locker ass'y  and over-torquing the bolts here is a basic chart for such matters - Saturday night before the races is no time for looking for the bolts ya just sheared from over-torquing . This is maybe on another thread somewhere but I didn't notice . 

 

GRADE 5
GRADE 8
Coarse Thread
Coarse Thread
Size
Clamp Load
Plain (ft. lbs.)
Plated
Size
Clamp Load
Plain (ft. lbs.)
Plated (ft. lbs.)
1/4-20 (.250)
2025
8
76 in lbs.
1/4-20 (.250)
2850
12
9
5/16-18 (.3125)
3338
17
13 ft lbs.
5/16-18 (.3125)
4725
25
18
3/8-16 (.375)
4950
31
23 ft lbs.
3/8-16 (.375)
6975
44
33
7/16-14 (.4375)
6788
50
37 ft lbs.
7/16-14 (.4375)
9600
70
52
1/2-13 (.500)
9075
76
57 ft lbs.
1/2-13 (.500)
12750
106
80
9/16-12 (.5625)
11625
109
82 ft lbs.
9/16-12 (.5625)
16350
153
115
5/8-11 (.625)
14400
150
112 ft lbs.
5/8-11 (.625)
20325
212
159
3/4-10 (.750)
21300
266
200 ft lbs.
3/4-10 (.750)
30075
376
282
7/8-9 (.875)
29475
430
322 ft lbs.
7/8-9 (.875)
41550
606
454
1-8 (1.000)
38625
644
483 ft lbs.
1-8 (1.000)
54525
909
682
1 1/8-7 (1.125)
42375
794
596 ft lbs.
1 1/8-7 (1.125)
68700
1288
966
1 1/4-7 (1.250)
53775
1120
840 ft lbs.
1 1/4-7 (1.250)
87225
1817
1363
1 3/8-6 (1.375)
64125
1470
1102 ft lbs.
1 3/8-6 (1.375)
103950
2382
1787
1 1/2-6 (1.500)
78000
1950
1462 ft lbs.
1 1/2-6 (1.500)
126450
3161
2371
 
GRADE 5
GRADE 8
Fine Thread
Fine Thread
Size
Clamp Load
Plain (ft. lbs.)
Plated
Size
Clamp Load
Plain (ft. lbs.)
Plated (ft. lbs.)
1/4-28 (.250)
2325
10
87 in lbs.
1/4-28 (.250)
3263
14
10
5/16-24 (.3125)
3675
19
14 ft lbs.
5/16-24 (.3125)
5113
27
20
3/8-24 (.375)
5588
35
26 ft lbs.
3/8-24 (.375)
7875
49
37
7/16-20 (.4375)
7575
55
41 ft lbs.
7/16-20 (.4375)
10650
78
58
1/2-20 (.500)
10200
85
64 ft lbs.
1/2-20 (.500)
14400
120
90
9/16-18 (.5625)
12975
122
91 ft lbs.
9/16-18 (.5625)
18300
172
129
5/8-18 (.625)
16350
170
128 ft lbs.
5/8-18 (.625)
23025
240
180
3/4-16 (.750)
23775
297
223 ft lbs.
3/4-16 (.750)
33600
420
315
7/8-14 (.875)
32475
474
355 ft lbs.
7/8-9 (.875)
45825
668
501
1-12 (1.000)
42300
705
529 ft lbs.
1-12 (1.000)
59700
995
746
1-14 (1.000)
32275
721
541 ft lbs.
1-14 (1.000)
61125
1019
764
1 1/8-12 (1.125)
47475
890
668 ft lbs.
1 1/8-12 (1.125)
77025
1444
1083
1 1/4-12 (1.250)
59550
1241
930 ft lbs.
1 1/4-12 (1.250)
96600
2012
1509
1 3/8-12 (1.375)
72975
1672
1254 ft lbs.
1 3/8-12 (1.375)
118350
2712
2034
1 1/2-12 (1.500)
87750
2194
1645 ft lbs.
1 1/2-17 (1.500)
142275
3557
2668


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red-oak


St.Marys Ont -Rod Side Member

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Posts: 272
Date:
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That is a great chart to hang up in the shop thanks

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Marten


Kemptville Ont Carpenter/Renovations

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Posts: 583
Date:
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Where did you find this chart or is there a way of printing it off, just the chart from here?

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58chev


Etobicoke On Rod-side Member

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Posts: 641
Date:
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Here is a PDF that can be printed. Not exactly the same as the one posted.

www.imperialsupplies.com/pdf/A_FastenerTorqueCharts.pdf

Or you might find a picture that will print out nicely.

www.google.ca/search

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58 Chevrolet Delray
admin


"Fatchuk" Rod-side member Board administration & clean up guy

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Posts: 1786
Date:
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Marten You can just copy and paste that into your word program and enlarge the font to what you want and print it from there..



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