Internal combustion engines — Piston rings — Part 1: Keystone rings

Specifies the essential dimensional features of T-, TB-, TM-, K-, KB- and KM-keystone piston ring types. The requirements apply to compression rings for reciprocating internal combustion piston engines, up to and including 200 mm diameter. Tabulates dimensions of T-, TB- and TM-keystone rings having 6° (table 7) and K-, KB- and KM-keystone rings having 15° (table 8).