The Valve,safety Relief, cataloged under National Stock Number 4820-01-018-5179, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Astec America Inc.. Government technical data includes 14 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 | 4820-01-018-5179 |
| Primary Part Number | 572-50370 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Astec America Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | PRESSED-IN |
| Connection Style | GROOVED (TUBE) SECOND END |
| Connection Style | STREAMLINED WITH ONE BRAZING RING (TUBE) FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.875 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| Material | STEEL SEAT |
| Material | STEEL FLOW CONTROL DEVICE |
| 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 |
|---|---|
| 572-50370 PRIMARY | Astec America Inc. (USA) |
NSN 4820-01-018-5179 is a Valve,safety Relief, manufactured by Astec America Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-018-5179 has 1 manufacturer part number on file: 572-50370 (Astec America Inc.).
Key specifications for 572-50370: Flow Control Device: DISK; Renewable Seat Ring Type: PRESSED-IN; Connection Style: GROOVED (TUBE) SECOND END; Connection Style: STREAMLINED WITH ONE BRAZING RING (TUBE) FIRST END. 14 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.