The Valve,safety Relief, cataloged under National Stock Number 4820-01-187-1973, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-187-1973 |
| Primary Part Number | B49038 331T365PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Adjustable Pressure Range | +331.0 TO 365.0 POUNDS PER SQUARE INCH+331.0 TO 365.0 POUNDS PER SQUARE INCH LBS |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| 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 |
|---|---|
| B49038 331T365PSI PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B49038 331T365PSI | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-187-1973 is a Valve,safety Relief, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-187-1973 has 1 manufacturer part number on file: B49038 331T365PSI (Hunt Valve Company, Inc.).
Key specifications for B49038 331T365PSI: Flow Control Device: DISKDISK; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Adjustable Pressure Range: +331.0 TO 365.0 POUNDS PER SQUARE INCH+331.0 TO 365.0 POUNDS PER SQUARE INCH LBS; Material: COPPER ALLOY BODY. 5 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.