BRADEN CH400B - Recommended Fastener Torque

34
RECOMMENDED FASTENER TORQUE
The general-purpose torque shown in the chart applies to SAE Grade 5 bolts, studs and standard steel full, thick and
high nuts.
Higher or lower torques for special applications will be specied such as the use of spanner nuts, nuts on shaft ends,
jam nuts and where distortion of parts or gaskets is critical.
Lubricated torque values based on use of SAE 30W engine oil applied to threads and face of bolt or nut.
Avoid using thread lubricants as the applied torque may vary by 10-40% depending upon product used.
Dr
y
LubedDr
y
Lube
dD
r
y
LubedDr
y
Lubed
Torque
(
LB-FT
)
Grade 5Grade 8
1/4
20
28
5/16
3/8
18
24
16
24
7/16
1/2
9/16
5/8
8612 9
17 13 24 18
45 35
70 50
2331
50 35
80
11080 150 110
1105575
150 115 210 160
14
20
13
20
12
18
11
18
265 200
Torque
(
LB-FT
)
Grade 5Grade 8
380 280
7/8
9
14
420 325 600 450
3/4
10
16
680
1 1/8
7
12
790 590 1290 970
1
8
14
640
7
12
1120 835
910485
1460
1820 1360
1 3/8
6
12
1460 1095 2385 1790
1 1/4
3160 2370
RECOMMENDED FASTENER TORQUE
Bolt Dia.
Inches
Thds Per
Inch
Bolt Dia.
Inches
Thds Per
Inch
1 1/2
6
12
1940
To convert lb.-ft. to kg-m, multiply lb.-ft. value by 0.1383.