The Valve,safety Relief, cataloged under National Stock Number 4820-01-465-4777, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-465-4777 |
| Primary Part Number | 9325C16-1052-01 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Connection Style | GASKET SEAL (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 3.000 INCHES FIRST END IN |
| Nominal Thread Size | 2.500 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | PRESSURE SEAL, RING TYPE |
| Material | COPPER ALLOY BODY |
| Material | RUBBER NATURAL SEAT |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | NPT FIRST END |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 40-41 | Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company (USA) |
| 9325C16-1052-01 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 9325C-1052 | D/9 Drawing number reference only The Entwistle Company Llc |
NSN 4820-01-465-4777 is a Valve,safety Relief, manufactured by The Entwistle Company Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-465-4777 has 2 manufacturer part numbers on file: 40-41 (Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company), 9325C16-1052-01 (The Entwistle Company Llc).
Key specifications for 9325C16-1052-01: Connection Style: GASKET SEAL (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: ANGLE. 16 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.
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.