The Ring,piston, cataloged under National Stock Number 4310-00-294-2274, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-294-2274 |
| Primary Part Number | 180P |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| FSC Application Data | PISTON,PUMP,RECIPROCATING,POWER DRIVEN |
| Bore Diameter Oversize | 0.010 INCHES IN |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, TWO PIECE, STRAIGHT FACE, W/RESTRAINER |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.2360 INCHES MINIMUM AND 0.2610 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 7.500 INCHES IN |
| Material | IRON BOTTOM |
| Material | COPPER ALLOY TOP |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 180P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| DX84982PC9 | 5/9 Secondary reference U.S. Government activity |
| SL5700PC9 | 5/9 Secondary reference U.S. Government activity |
| SL5706PC9 | 5/9 Secondary reference U.S. Government activity |
| 180P | 3/9 Design control — primary reference U.S. Government activity |
| SL5701PC9 | 5/9 Secondary reference U.S. Government activity |
NSN 4310-00-294-2274 is a Ring,piston, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-294-2274 has 1 manufacturer part number on file: 180P (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
3 possible matches (shared part number, not a government interchangeability claim): 4520-00-450-9554, 5310-00-807-4338, 4010-01-470-6534. Verify interchangeability with system specifications before substitution.
Key specifications for 180P: FSC Application Data: PISTON,PUMP,RECIPROCATING,POWER DRIVEN; Bore Diameter Oversize: 0.010 INCHES IN; Overall Width: 0.6190 INCHES MINIMUM AND 0.6220 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, TWO PIECE, STRAIGHT FACE, W/RESTRAINER. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.