The Valve,safety Relief, cataloged under National Stock Number 4820-01-220-1962, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cosmodyne, Llc Dba Cosmodyne Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Cosmodyne, Llc Dba Cosmodyne Llc (CAGE 11243); Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-1962 |
| Primary Part Number | 23317-2CP |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 23317-2CP | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| 23317-2CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 23317-2 | 5/1 Secondary reference Cosmodyne, Llc Dba Cosmodyne Llc |
| 23317-2 | 3/1 Design control — primary reference Hexco International Dba Acd |
NSN 4820-01-220-1962 is a Valve,safety Relief, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-1962 has 2 manufacturer part numbers on file: 23317-2CP (Cosmodyne, Llc Dba Cosmodyne Llc), 23317-2CP (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-642-1377. 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.