The Valve,safety Relief, cataloged under National Stock Number 4820-01-531-3539, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hamilton Jet, Inc.. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-531-3539 |
| Primary Part Number | 202986 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hamilton Jet, Inc. |
| Status | ACTIVE |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| 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 |
|---|---|
| 202986 PRIMARY | Hamilton Jet, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 65184 | 5/9 Secondary reference Hamilton Jet, Inc. |
NSN 4820-01-531-3539 is a Valve,safety Relief, manufactured by Hamilton Jet, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-531-3539 has 1 manufacturer part number on file: 202986 (Hamilton Jet, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-532-0579, 4820-01-532-0584. Verify interchangeability with system specifications before substitution.
Key specifications for 202986: Operating Pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; End Item Identification: WATERJET, MODEL HJ241, 1.50 : 1 RTO. 1 specification is 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.