SUGGESTED
TORQUE VALUES
& CLAMP LOADS
For reference only.
On Critical Applications consult the Manufacturer of the
component or item
HEX HEAD CAP SCREWS (To convert in-lbs to ft-lbs simply divide by 12)
(To convert ft-lbs to in-lbs simply multiply by 12)
Nominal
Size
Tensile
Stress
Area
(sq. in)
Grade
2
Grade
5
Grade
8
Clamp
Load
(lb)
Tightening
Torque
(in-lb)
Clamp
Load
(lb)
Tightening
Torque
(in-lb)
Clamp
Load
(lb)
Tightening
Torque
(in-lb)
1/4"-28
.0363
1200-1800
47-65
1855-2782
72-100
2619-3928
107-142
1/4"-20
.0318
1050-1575
41-57
1622-2432
65-88
2291-3437
93-129
5/16"-24
.0580
1914-2871
93-129
2961-4441
144-200
4180-6270
212-294
5/16"-18
.0524
1729-2594
84-117
2674-4011
130-18O
3775-5662
199-265
3/8"-24
.0878
2897-4346
169-234
4479-6719
262-363
6324-9486
384-534
3/8"-16
.0774
2557-3836
150-207
3952-5928
231-320
5579-8369
339-471
7/16"-20
.1187
3917-5876
267-370
6054-9080
413-572
3546-12820
606-841
7/16"-14
.1063
3508-5262
239-331
5421-8132
370-512
7654-11480
542-753
Nominal
Size
Tensile
Stress
Area
(sq. in)
Clamp
Load
(lb)
Tightening
Torque
(ft-lb)
Clamp
Load
(lb)
Tightening
Torque
(ft-lb)
Clamp
Load
(lb)
Tightening
Torque
(ft-lb)
1/2"-20
.1599
5278-7917
412-570
8151-12236
53-73
11516-64746
81-103
1/2"-13
.1419
4683-7024
365-506
7237-10855
47-65
10217-15325
72-96
9/16"-18
.2029
6698-10048
49-68
10356-15528
76-105
14615-21922
115-154
9/16"-12
.1731
5714-8571
42-58
9279-13319
68-90
13100-19651
103-138
5/8"-18
.2559
8446-12670
63-95
13053-19580
106-147
18428-27643
175-233
5/8"-11
.2260
7458-11187
61-84
11526-17289
94-130
16277-24408
143-191
3/4"-16
.3729
12392-18373
185-257
19021-28531
185-257
26853-40280
284-378
3/4"-10
.3344
11037-16555
108-149
17055-25582
166-230
24081-36122
254-338
1"-12
.6630
13149-19703
164-247
33815-50722
440-609
47739-71608
670-894
1"-8
.6060
12010-17994
150-225
30892-46339
402-566
43613-65420
619-817
1-1/8"-12
.8562
16948-25423
238-357
38006-57009
534-801
61632-92448
866-1300
1-1/8"-7
.7531
15107-2261
212-318
33877-50816
476-714
54936-82404
772-1158
1-1/4"-12
1.0734
21245-31868
332-498
47641-71462
744-1116
77256-115884
1207-1810
1-1/4"-7
.9646
19186-28719
300-450
43023-64535
672-1008
69768-104652
1090-1635
Standard Steel Bolt
Torque Specifications (To convert in-lbs to ft-lbs
simply divide by 12)
(To convert ft-lbs to in-lbs simply multiply by 12)
(For reference only. On
Critical Applications consult the Manufacturer of the component or item)
Bolt Size
(in.)
Standard Dry Torque in Foot-Pounds
SAE
Grade 2
74,000 psi
Low Carbon
Steel
SAE
Grade 5
120,000 psi
Med. Carbon
Heat T. Steel
SAE
Grade 8
150,000 psi
Med. Carbon
Alloy Steel
1/4-20
6
10
14
5/16-18
12
19
29
3/8-16
20
33
47
7/16-14
32
54
78
1/2-13
47
78
119
9/16-12
69
114
169
5/8-11
96
154
230
3/4-10
155
257
380
7/8-9
206
382
600
1-8
310
587
700
1-1/8 -7
480
794
1430
1-1/4 -7
375
1105
1975
1-3/8 -6
900
1500
2650
1-1/2 -6
1100
1775
3200
1-5/8 -5.5
1470
2425
4400
1-3/4 -5
1900
3150
5650
1-7/8 -5
2360
4200
7600
2 -5
2750
4550
8200
Metric Steel Bolts
Torque Specifications
Bolt Size
Standard Dry Torque in Foot-Pounds
Standard 5D
71,160 psi
Med. Carbon Steel
Standard 8G
113,800 psi
Med. Carbon Steel
Standard 10K
142,000 psi
Med. Carbon Steel
Standard 12K
170,674 psi
Med. Carbon Steel
6mm x 1.00
5
6
8
10
8mm x 1.00
10
16
22
27
10mm x 1.25
31
40
45
49
12mm x 1.25
34
54
70
86
14mm x 1.25
55
89
117
137
16mm x 2.00
83
132
175
208
18mm x 2.00
111
182
236
283
22mm x 2.50
182
284
394
464
24mm x 3.00
261
419
570
689
God Bless America
Fairbury
Fastener 23092 E. 800 North Rd. /
U.S. Rt 24 East
Fairbury, IL 61739
Phone: (815) 692-3848 FAX: (815) 692-2200
E- Mail: sales @
fairbury fastener . com
Call 815-692-3848 to place your order
We do NOT process international orders. Prices are subject to
change and may
be different than shown on our site.
Call for current pricing.
All Returns subject to restocking.
