The Ring,valve Piston, cataloged under National Stock Number 4820-01-299-5769, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is R & D Machine Rafael Anaya Div Defense Logistics Agency. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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,valve Piston |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | R & D Machine Rafael Anaya Div Defense Logistics Agency (CAGE 8W880) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-299-5769 |
| Primary Part Number | 1144-1 |
| Item Name | Ring,valve Piston |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | R & D Machine Rafael Anaya Div Defense Logistics Agency |
| 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 |
|---|---|
| 1144-1 PRIMARY | R & D Machine Rafael Anaya Div Defense Logistics Agency (USA) |
| 1140 ITEM 10 | R & D Machine Rafael Anaya Div Defense Logistics Agency (USA) |
| Reference | Meaning |
|---|---|
| 1140 | D/9 Drawing number reference only R & D Machine Rafael Anaya Div Defense Logistics Agency |
NSN 4820-01-299-5769 is a Ring,valve Piston, manufactured by R & D Machine Rafael Anaya Div Defense Logistics Agency, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-299-5769 has 2 manufacturer part numbers on file: 1144-1 (R & D Machine Rafael Anaya Div Defense Logistics Agency), 1140 ITEM 10 (R & D Machine Rafael Anaya Div Defense Logistics Agency).
2 possible matches (shared part number, not a government interchangeability claim): 7643-01-404-5393, 5995-01-579-0087. 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.