CUMMINS N14 - Torque Values for Straight Thread Fittings and Plugs

Pipe Plug Torque Values
Size Torque Torque
Thread Actual Thread O.D. In Aluminum Components
In Cast Iron or
Steel Components
in in N•m ft-lb N•m ft-lb
1/16 0.32 5 45 in-lb 15 10
1/8 0.41 15 10 20 15
1/4 0.54 20 15 25 20
3/8 0.68 25 20 35 25
1/2 0.85 35 25 55 40
3/4 1.05 45 35 75 55
1 1.32 60 45 95 70
1-1/4 1.66 75 55 115 85
1-1/2 1.90 85 65 135 100
Torque Values for Straight Thread Fittings and Plugs
Steel Fitting
Thread Size (In Cast Iron or Steel*) Brass Fitting
5/16-24 5 to 6 N•m [45 to 50 in-lb] 3.1 to 3.4 N•m [27 to 30 in-lb]
3/8-24 10 to 11 N•m [90 to 100 in-lb] 5.1 to 5.7 N•m [45 to 50 in-lb]
7/16-20 15 to 17 N•m [135 to 150 in-lb] 6.5 to 7.3 N•m [58 to 65 in-lb]
1/2-20 15 to 18 N•m [11 to 13 ft-lb] 8.2 to 9.0 N•m [72 to 80 in-lb]
9/16-18 30 to 34 N•m [22 to 25 ft-lb] 12.7 to 14.1 N•m [112 to 125 in-lb]
3/4-16 50 to 56 N•m [37 to 41 ft-lb] 24 to 28 N•m [18 to 21 ft-lb]
7/8-14 71 to 79 N•m [52 to 58 ft-lb] 38 to 39 N•m [26 to 29 ft-lb]
1 1/16-12 102 to 113 N•m [75 to 83 ft-lb] 50 to 56 N•m [37 to 41 ft-lb]
1 3/16-12 122 to 136 N•m [90 to 100 ft-lb] 64 to 71 N•m [47 to 52 ft-lb]
1 5/16-12 142 to 157 N•m [105 to 116 ft-lb] 71 to 79 N•m [52 to 58 ft-lb]
1 5/8-12 213 to 237 N•m [157 to 175 ft-lb] 91 to 102 N•m [67 to 75 ft-lb]
1 7/8-12 305 to 339 N•m [225 to 250 ft-lb] 102 to 115 N•m [75 to 85 ft-lb]
2 1/2-12 457 to 509 N•m [337 to 375 ft-lb] 126 to 141 N•m [93 to 104 ft-lb]
* Steel fittings in brass or aluminum must use comparable brass fitting torque for the thread size.
Pipe Plug Torque Values Section V - Engine Component Specifications
Page V-46 N14