The Valve,safety Relief, cataloged under National Stock Number 4820-01-735-4710, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is David Perkins Enterprises, Inc Div DP Enterprises, Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711); David Perkins Enterprises, Inc Div DP Enterprises, Inc (CAGE 1J0J6) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-735-4710 |
| Primary Part Number | HV50-63 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | David Perkins Enterprises, Inc Div DP Enterprises, Inc |
| 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 |
|---|---|
| 6640965-268-5 | Naval Sea Systems Command (USA) |
| HV50-63 PRIMARY | David Perkins Enterprises, Inc Div DP Enterprises, Inc (USA) |
| Reference | Meaning |
|---|---|
| 6640965 PG 344-346 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-735-4710 is a Valve,safety Relief, manufactured by David Perkins Enterprises, Inc Div DP Enterprises, Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-735-4710 has 2 manufacturer part numbers on file: 6640965-268-5 (Naval Sea Systems Command), HV50-63 (David Perkins Enterprises, Inc Div DP Enterprises, Inc).
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.