The Valve,safety Relief, cataloged under National Stock Number 4820-01-291-5227, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is C-Tech Industries Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-291-5227 |
| Primary Part Number | 381064 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | C-Tech Industries Inc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Operating Pressure | 2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 2000.0 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 |
|---|---|
| 381064 PRIMARY | C-Tech Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 381076 | 5/9 Secondary reference C-Tech Industries Inc |
NSN 4820-01-291-5227 is a Valve,safety Relief, manufactured by C-Tech Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-291-5227 has 1 manufacturer part number on file: 381064 (C-Tech Industries Inc).
Key specifications for 381064: Flow Control Device: POPPET; Connection Type: THREADED INTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Operating Pressure: 2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 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.