The Valve,safety Relief, cataloged under National Stock Number 4820-01-695-4957, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Opw Fueling Components Inc. Div Opw Fueling Components. Government technical data includes 13 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 | 4820-01-695-4957 |
| Primary Part Number | 199ASV-2100 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Opw Fueling Components Inc. Div Opw Fueling Components |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Supplementary Features | ANNODIZED BODY |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Operating Pressure | 40.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.0 INCHES IN |
| Maximum Operating Temp | 120.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | GAS, NATURAL SECOND RESPONSE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON FIRST RESPONSE |
| Material | ALUMINUM BODY |
| Material | ALUMINUM BONNET |
| 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 |
|---|---|
| 199ASV-2100 PRIMARY | Opw Fueling Components Inc. Div Opw Fueling Components (USA) |
NSN 4820-01-695-4957 is a Valve,safety Relief, manufactured by Opw Fueling Components Inc. Div Opw Fueling Components, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-695-4957 has 1 manufacturer part number on file: 199ASV-2100 (Opw Fueling Components Inc. Div Opw Fueling Components).
Key specifications for 199ASV-2100: Flow Control Device: POPPET; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Supplementary Features: ANNODIZED BODY; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 13 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.