TM 5-3805-291-23-1
TORQUE LIMITS - CONTINUED
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TAPERED PIPE THREAD FITTINGS
Torque is based on diameter of thread. Torque values are identical for coarse and fine threads.
N OT E
The following table has recommended standard torque value for tapered pipe thread fitting for use on Cat-
erpillar engines.
Table 18. Tapered Pipe Thread Fittings.
Standard Torque
Diameter of the Pipe
Threads with
Threads without
Thread (In.)
5P-3413 Pipe Sealant
Pipe Sealant
1/16
90 lb-in. (10 Nm)
90 lb-in. (10 Nm)
1/8
12 lb-ft (16 Nm)
12 lb-ft (16 Nm)
1/4
15 lb-ft (20 Nm)
18 lb-ft (24 Nm)
3/8
26 lb-ft (35 Nm)
33 lb-ft (45 Nm)
1/2
33 lb-ft (45 Nm)
44 lb-ft (60 Nm)
3/4
44 lb-ft (60 Nm)
55 lb-ft (75 Nm)
1
55 lb-ft (75 Nm)
65 lb-ft (88 Nm)
1 1/4
65 lb-ft (88 Nm)
80 lb-ft (108 Nm)
1 1/2
80 lb-ft (108 Nm)
95 lb-ft (129 Nm)
2
95 lb-ft (129 Nm)
120 lb-ft (163 Nm)
Note: Use 50 percent of torque values from Table 18 when fitting, plug, or port
material is nonferrous. Use 50 percent of torque values from Table 18 when tapered
thread is mating with straight thread.
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