The Valve,safety Relief, cataloged under National Stock Number 4820-01-680-2937, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corp Div Instrumentation Products Division. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-680-2937 |
| Primary Part Number | 625B-1-12-2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corp Div Instrumentation Products Division |
| Status | ACTIVE |
| Style Designator | ANGLE FLANGED ENDS |
| Operating Pressure | 15.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | ALUMINUM BODY |
| Material | RUBBER SYNTHETIC O-RING |
| 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 |
|---|---|
| 625B-1-12-2 PRIMARY | Parker-Hannifin Corp Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| 625B-1-12-2 | D/9 Drawing number reference only Parker Hannifin Corp Hydraulic Valve Div |
NSN 4820-01-680-2937 is a Valve,safety Relief, manufactured by Parker-Hannifin Corp Div Instrumentation Products Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-680-2937 has 1 manufacturer part number on file: 625B-1-12-2 (Parker-Hannifin Corp Div Instrumentation Products Division).
Key specifications for 625B-1-12-2: Style Designator: ANGLE FLANGED ENDS; Operating Pressure: 15.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Bonnet Type: INSIDE SPRING; Maximum Operating Temp: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF. 7 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.