The Valve,check, cataloged under National Stock Number 4820-01-622-1337, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-622-1337 |
| Primary Part Number | 803-1385637-052AF |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | V |
| Part Number | Manufacturer |
|---|---|
| 803-1385637-052AF PRIMARY | Naval Sea Systems Command (USA) |
| 803-1385637-052AF | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 803-1385637-052AF PRIMARY | Monarch Supply Company, Inc. Dba Monarch Supply Co Inc (USA) |
NSN 4820-01-622-1337 is a Valve,check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-622-1337 has 3 manufacturer part numbers on file: 803-1385637-052AF (Naval Sea Systems Command), 803-1385637-052AF (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 803-1385637-052AF (Monarch Supply Company, Inc. Dba Monarch Supply Co Inc).
Key specifications for 803-1385637-052AF: Part Name Assigned by Controlling Agency: VALVE,5 IN,SWING 21B IN. 0 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.
NSN 4820-01-622-1337 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.