National Item Identification Number

01-239-7320
012397320
2990-01-239-7320
2990012397320

National Stock Number

Item Name

RING,PISTON

Federal Supply Class

2990

Description

A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes PACKING, PREFORMED; RETAINER, OIL SEAL; RETAINER, PACKING; RING, RETAINING; RING WIPER; and SEAL RING, METAL.

Commercial and Government Entity Code (Supplier Data)

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06021

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75160

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75755

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Reference Numbers (Part Numbers)

R55024
R55024
R55024

Required Categories

Required Description