Historical
ISO 6621-5:1988
Internal combustion engines - Piston rings - Part 5 : Quality requirements
Specifies those quality aspects which are capable of definition but not normally found on a drawing specification. Covers single-piece and multi-piece piston rings of various materials. Applies to all rings up to and including 200 mm diameter covered by the above classification for both reciprocating internal combustion piston engines and compressors.
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]