The Valve,safety Relief, cataloged under National Stock Number 4820-01-522-7274, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-522-7274 |
| Primary Part Number | 7417732-001 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Style Designator | SCREW-IN CARTRIDGE |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Opening Pressure Setting | 3600.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 4.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| 7417732-001 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7417732 | D/9 Drawing number reference only Naval Sea Systems Command |
| 7417731 | 7/1 Vendor item drawing reference Naval Sea Systems Command |
NSN 4820-01-522-7274 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-522-7274 has 1 manufacturer part number on file: 7417732-001 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-522-7289, 4820-01-522-7673. Verify interchangeability with system specifications before substitution.
Key specifications for 7417732-001: Connection Type: THREADED EXTERNAL BOSS FIRST END; Style Designator: SCREW-IN CARTRIDGE; Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Special Features: MAKE FROM CAGE 54035, PART NUMBER RPEC-LCN, BY METAL SPRAYED COATING I.A.W. WITH MIL-STD-2138 USING TYPE 1, 2, OR 3 ABRASIVE BLASTING SYSTEM WITH ALUMINUM GRIT BLASTING PARTICALS. SPRAY TYPE SHALL BE CONSUMABLE ELECTRODE, ELECTRIC ARC, SEAL COAT THAT CONFORMS TO TT-P-28. DO NOT TOP COAT.. 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.