MANIFOLD-EXHAUST 3018256 - Caterpillar

Note: Use 50 percent of the torque values from Table 1 when the fitting or the port material is nonferrous.
Table 2
Metric Ferrous Straight Thread O-Ring Plug
Torques for Mating with Ferrous Materials
Thread Size
Metric Internal Hex Plug Torque External Hex Plug Torque
M8 10 2 N m (89 18 lb in) 10 2 N m (89 18 lb in)
M10 17 3 N m (150 27 lb in) 20 3 N m (177 27 lb in)
M12 25 4 N m (221 35 lb in) 35 5 N m (26 4 lb ft)
M14 45 7 N m (33 5 lb ft) 45 7 N m (33 5 lb ft)
M16 55 8 N m (41 6 lb ft) 55 8 N m (41 6 lb ft)
M18 70 11 N