GEI 56128-L
© Copyright 2016 General Electric Company
16
XI.
TIGHTENING TORQUE FOR SAE HARDWARE
General Notes related to fasteners:
1.
Medium carbon steel fasteners per ASTM A449 Type 1.
2.
Stainless steel fasteners per ASTM F593.
3.
Threaded holes in parts for fasteners are per System 21, ASME/ANSI B1.3
Table 4A: Tightening Torque Range
Medium Carbon Steel SAE Hardware Grade 5 (Unless specified in below table)
Screw/Bolt Size
Typical Application
Torque
(Inch-lbs)
Torque
(N-m)
#10 (Low Carbon Steel)
Bearing Cap
15 - 25
1.7 – 2.8
1/4 in (Low Carbon Steel)
Bearing Cap
35 - 60
4.0 – 6.8
1/4 in
All Parts, except Bearing Cap and
Fan Cover
70 – 96
7.9 – 10.8
1/4 in Grade 8
Fan Cover Mounting
100 - 145
11 – 16
5/16 in
Bearing Cap
78 - 120
8.8 – 14
5/16 in
All Parts, except Bearing Cap
170 - 250
19 – 28
3/8 (Low Carbon Steel)
Conduit Box Cover
180 – 240
20 – 27
3/8 in
All Parts, except Conduit Box
Cover
250 – 370
28 – 42
1/2 in
All Parts
610 – 920
70 – 100
3/4 in
All Parts
2150 – 3200
240 – 360
Table 4B: Tightening Torque Range
Stainless Steel SAE Hardware Property Class 50
Screw/Bolt Size
Typical Application
Torque
(Inch-lbs)
Torque
(N-m)
#10
Bearing Cap
15 – 25
1.7 – 2.8
1/4 in
Bearing Cap
35 – 60
4.0 – 6.8
1/4 in
All parts, except Bearing Cap
60 - 75
6.8 – 8.5
5/16 in
Bearing Cap
78 – 120
8.8 – 14
5 /16 in
All parts, except Bearing Cap
130 – 155
15 – 18
3/8 in
All Parts
230 – 275
26 – 31
1/2 in
All Parts
550 - 670
62 – 76
5/8 in
All parts
1100 – 1340
120 – 150
3/4 in
All Parts
2000 - 2360
230 - 270
