ISO 6624-3:2017 specifies the essential dimensional features of keystone rings made of steel, types T, TB, TBA, TM, K, KB, KBA and KM, having diameters from 70 mm up to and including 160 mm, used in reciprocating internal combustion piston engines.
PUBLISHED
ISO 6624-3:2017
PROJECT
ISO/DIS 6624-3
40.20
DIS ballot initiated: 12 weeks
Feb 13, 2026
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