The Ring,piston, cataloged under National Stock Number 4310-00-273-0992, 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. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,piston |
| FSC / FSG | 4310 — Compressors and Vacuum Pumps (FSG 43) |
| Manufacturers | Curtiss-Wright Electro-Mechanical Corporation Div Epd (CAGE 0UBG9); Rps-Fl, Inc. Dba Rps Inc (CAGE 54402) |
| Parameter | Value |
|---|---|
| NSN | 4310-00-273-0992 |
| Primary Part Number | 041644-00 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| 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 |
|---|---|
| 041644-00 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 10679 | Rps-Fl, Inc. Dba Rps Inc (USA) |
| Reference | Meaning |
|---|---|
| SL5731PC143-144 | 5/9 Secondary reference U.S. Government activity |
| 041644-00 | 3/9 Design control — primary reference U.S. Government activity |
| SL5726PC143-144 | D/9 Drawing number reference only U.S. Government activity |
| SL5726-143-144 | 5/9 Secondary reference U.S. Government activity |
| DX84980PC693 | 5/9 Secondary reference U.S. Government activity |
| 157P | 5/9 Secondary reference U.S. Government activity |
| SL5709PC693 | 5/9 Secondary reference U.S. Government activity |
| SK-1001410 | 5/9 Secondary reference U.S. Government activity |
| SL5726 | D/9 Drawing number reference only U.S. Government activity |
| SL5713 PC693 | 5/9 Secondary reference U.S. Government activity |
NSN 4310-00-273-0992 is a Ring,piston, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-273-0992 has 2 manufacturer part numbers on file: 041644-00 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 10679 (Rps-Fl, Inc. Dba Rps Inc).
4 possible matches (shared part number, not a government interchangeability claim): 4030-00-310-6899, 4820-01-223-8742, 5360-01-240-9810. Verify interchangeability with system specifications before substitution.
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.