D-1. Scope. SAE capscrews are graded according to the strength of the capscrew. They are marked on the head so the
correct strength and torque value are known. The tables in this appendix will list the capscrew markings with correct
torque values as well as values for pipe plugs and metric bolts.
When replacing capscrews, always use a capscrew of the same
measurement and strength as the capscrew being replaced. Using
incorrect capscrews can result in equipment damage. Bolts threaded into
aluminum require much less torque.
are unknown. The torque values listed in the tables are based on the use
of lubricated threads.
Table D-1. Capscrew Markings and Torque Values