The Valve,safety Relief, cataloged under National Stock Number 4820-01-265-1936, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Superior Valve Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-265-1936 |
| Primary Part Number | 3214-450 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Superior Valve Co |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.563 INCHES SECOND END IN |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Thread Class | 3A SECOND END A |
| Thread Quantity Per Inch | 18 SECOND END |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) SECOND END |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 450.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 3214-450 PRIMARY | Superior Valve Co (USA) |
NSN 4820-01-265-1936 is a Valve,safety Relief, manufactured by Superior Valve Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-265-1936 has 1 manufacturer part number on file: 3214-450 (Superior Valve Co).
Key specifications for 3214-450: Connection Style: FLARED (TUBE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL TUBE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 15 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.