Capscrew Markings and Torque Values - Metric

CAPSCREW MARKINGS AND TORQUE VALUES - METRIC





Metric capscrews are identified by the grade number stamped on the head of the capscrew or on the surface of metric nuts. The higher the number, the greater the strength of the capscrew.

NOTES:

1. Do not use these values when the torque values are specified in another section of the manual.
2. These values are based on clean, dry threads. Reduce the value by 10% when a lubricant is used. Reduce the value by 20% if new plated capscrews are used.
3. Always use caution to be sure that capscrews from the engine are put back in their proper locations.
4. When replacing capscrews, always use a capscrew of the same dimensions and strength as the capscrew being replaced. Incorrect capscrews can result in engine damage.




METRIC CAPSCREW NOMENCLATURE

PIPE PLUGS, FITTINGS, AND ADAPTERS
When installing directional fittings, tees or elbows, first tighten it to the appropriate torque value and then continue to turn it in the tightening direction until it is aligned. Do not turn it in the loosening direction, and do not turn it more than one revolution past the specified torque value.

Apply liquid Teflon to all pipe fittings and plugs.

Torque For Pipe Plugs

Pipe Plug Size N-m [ft-lb]

1/16" 6 [4]
1/8" 8 [6]
1/4" 12 [9]
3/8" 15 [11]
1/2" 24 [18]
3/4" 36 [27]
1" 45 [33]