The Valve,safety Relief, cataloged under National Stock Number 4820-00-930-4074, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-930-4074 |
| Primary Part Number | 11593818 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | QQ-P-416,CLASS 3,TYPE II FED SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Connection Style | FLARELESS (TUBE) THIRD END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Connection Style | DOUBLE THREADED SECTION BOSS FITTING GASKET WITH LOCKNUT SEALING (BOSS) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE THIRD END |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | ANGLE |
| Material Document and Classification | MIL-S-13048 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 900.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND THIRD END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES THIRD END IN |
| Nominal Thread Size | 0.938 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Surface Treatment | CADMIUM LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A FIRST END A |
| Thread Class | 2A THIRD END A |
| Thread Quantity Per Inch | 16 SECOND END |
| Material | STEEL BODY |
| Thread Series Designator | UNEF FIRST END |
| Thread Series Designator | UN SECOND END |
| Thread Series Designator | UNF THIRD END |
| Valve Discharge Flow Rate | 7.0 GALLONS PER MINUTE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 11593818 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
| 1757000 | Sielman S.a. (GRC) |
| Reference | Meaning |
|---|---|
| 11593818 | 5/9 Secondary reference Spalla Inc |
| 4820009304074 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 4820-00-930-4074 is a Valve,safety Relief, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-930-4074 has 2 manufacturer part numbers on file: 11593818 (Army, United States Department of the Dba Rock Island Arsenal Jmtc), 1757000 (Sielman S.a.).
Key specifications for 11593818: Flow Control Device: POPPET; Surface Treatment Document and Classification: QQ-P-416,CLASS 3,TYPE II FED SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Connection Style: FLARELESS (TUBE) THIRD END; Connection Style: FLARELESS (TUBE) SECOND END. 28 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.
NSN 4820-00-930-4074 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.