The Valve,safety Relief, cataloged under National Stock Number 4820-01-657-7146, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Liftking Manufacturing Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-657-7146 |
| Primary Part Number | 901000 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Liftking Manufacturing Corp |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | FLARE(TUBE) FIRST END |
| Minimum Operating Temp | -40.0 FAHRENHEIT DEGF |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Operating Pressure | 3500.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.875 INCHES ALL ENDS IN |
| Maximum Operating Temp | 250.00 FAHRENHEIT SINGLE RESPONSE DEGF |
| Face to Face Distance | 3.40 INCHES IN |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Material | STEEL BODY |
| 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 |
|---|---|
| 901000 | Liftking Manufacturing Corp (CAN) |
| Reference | Meaning |
|---|---|
| 28001-210-40 | 3/9 Design control — primary reference Vonberg Valve, Inc. |
NSN 4820-01-657-7146 is a Valve,safety Relief, manufactured by Liftking Manufacturing Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-657-7146 has 1 manufacturer part number on file: 901000 (Liftking Manufacturing Corp).
Key specifications for 901000: Connection Style: FLARED (TUBE) SECOND END; Connection Style: FLARE(TUBE) FIRST END; Minimum Operating Temp: -40.0 FAHRENHEIT DEGF; Connection Type: THREADED INTERNAL BOSS FIRST END. 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.