Part Number
Part Number:
NSN:
NIIN:
Item Name:
RING , PISTON
Definition:
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.
CAGE Information
| Code | Company |
|---|---|
| 81349 | MILITARY SPECIFICATIONS PROMULGATED |
Federal Supply Class
Title
GASOLINE RECIPROCATING ENGINES,
Inclusions:
INCLUDES GAS RECIPROCATING ENGINES; ALL GASOLINE RECIPROCATING ENGINES EXCEPT AIRCRAFT PRIME MOVING.
Exclusions:
EXCLUDES ENGINE ACCESSORIES (FSC 2990).
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ACXD | RING STYLE | CONCENTRIC |
| FEAT | SPECIAL FEATURES | STAMPED TOP ON UPPER SURFACE OF RING |
| ADTE | JOINT STYLE | VERTICAL JOINT |
| ACXF | RADIAL WALL THICKNESS | 0.1620 INCHES MINIMUM AND 0.1720 INCHES MAXIMUM |
| ACXJ | OVERALL WIDTH | 0.9300 INCHES MINIMUM AND 0.9400 INCHES MAXIMUM |
| AAGR | CROSS-SECTIONAL SHAPE STYLE | STRAIGHT FACE, BOTTOM RELIEF |
| ACXZ | STANDARD BORE DIAMETER | 3.438 INCHES |
| MATT | MATERIAL | IRON OVERALL |