The Valve,safety Relief, cataloged under National Stock Number 4820-01-438-7563, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-438-7563 |
| Primary Part Number | R10AH2J2AH-BM3 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Connection Type | FLANGE ALL ENDS |
| Operating Pressure | 110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +90.0 TO 110.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| Material | BRONZE 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 |
|---|---|
| D52143 ASSY R10AH2J2AH-BM3 | Hunt Valve Company, Inc. (USA) |
| R10AH2J2AH-BM3 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| D52143 ASSY R10AH2J2AH-BM3 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| R10AH2J2AH-BM3 | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-438-7563 is a Valve,safety Relief, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-438-7563 has 2 manufacturer part numbers on file: D52143 ASSY R10AH2J2AH-BM3 (Hunt Valve Company, Inc.), R10AH2J2AH-BM3 (Hunt Valve Company, Inc.).
Key specifications for R10AH2J2AH-BM3: Connection Type: FLANGE ALL ENDS; Operating Pressure: 110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Adjustable Pressure Range: +90.0 TO 110.0 POUNDS PER SQUARE INCH LBS; Disk Loading Method: SPRING. 6 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.