MSI Hybrid Triplex - Appendix Cfastener Torque Data

Appendix C FASTENER TORQUE DATA
GENERAL TORQUE TABLE
Cap screws, nuts & bolts
Alloy Steel Studs & Nuts
SAE GRADE 5
SAE GRADE 7
Thread Diameter
& Thread Pitch
Dry Threads
Torque (ft*lbs)
Lubricated Threads
Torque (ft*lbs)
Dry Threads
Torque (ft*lbs)
Lubricated Threads
Torque (ft*lbs)
1/4-20 UNC
6.7
5.1
5/16-18 UNC
13.9
10.4
3/8-16 UNC
24.7
16.5
7/16-14 UNC
39.4
29.6
1/2-13 UNC
60.3
45.2
5/8-11 UNC
110
80
3/4-10 UNC
212
159
7/8-9 UNC
315
236
425
318
1-8 UNC
472
354
635
477
1-1/8- 7 UNC
633
475
900
675
1-1/4- 7 UNC
900
675
1270
955
1-3/8-8 UN
1660
1245
1-5/8-8 UN
2300
1-3/4-8 UN
2400
**Specific Installation Torques**
Connecting Rod Cap Nuts: Install 5/8”-11 castellated nuts using Loctite® Threadlocker Blue and torque to
150 ft-lbs of torque.
Connecting Rod Pin Screws: Install 3/8”-16 screws using Loctite® Threadlocker Blue and torque to 40 ft-lbs
of torque.
Crosshead Slide Screws: Install 5/8”-11 screws using Loctite® Threadlocker Blue and torque to 50 ft-lbs of
torque.
Fluid End Plungers: Install plungers using anti-seize compound and torque to 375 ft-lbs of torque.
Power End Plunger Screws: Install 1/2”-13 screws using Loctite® Threadlocker Blue and torque to 75 ft-lbs
of torque.
Revision K 03/12/2019
MSI - A Division of Dixie Iron Works, Ltd. All rights reserved.
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