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		                        | National Stock Number:
 3040-99-028-4952
 
 Federal Supply Class:
 3040
 
 National Item Identification Number:
 990284952
 
 Description:
 RING,PISTON
 
 Detail:
 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.
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 Manufacturer Information:
 
 | 21-10855 ITEM 26 | 0H7R3 | MACGREGOR USA INC. |  | HS1421S1.1 ITEM26 | N1137 | BAUER-NILSEN A/S |  | IBR 100/106-13 | U9272 | DLI SEALS LTD | 
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