ISO International Standard

Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron

ISO 6624-2:2016 specifies the essential dimensional features of half keystone rings made of cast iron, types HK, HKB and HKBA, having nominal diameters from 38 mm up to, and including, 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.

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