The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-016-2992, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-016-2992 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 3B |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Thread Class | 3B |
| First End Style Designator | GASKET SEAL |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024, T351 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024, T351 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Second End Style Designator | GASKET SEAL |
| Temp Control Device Type | THERMOSTATIC |
| First End Connection Type | THREADED INTERNAL BOSS |
| Temp Adjustability | NOT ADJUSTABLE |
| Surface Treatment | ANODIZE OUTSIDE |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | ALUMINUM ALLOY 2024 SEAT |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Second End Connection Type | THREADED INTERNAL BOSS |
| Valve Discharge Flow Rate | 2.0 GALLONS PER MINUTE |
| First End Nominal Thread Size | 0.750 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 55980 | 3/2 Design control — primary reference U.S. Government activity |
| 673496-101 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-01-016-2992 is a Valve,relief,pressure and Temper, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6515-01-497-7933. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-016-2992: Flow Control Device: POPPET; First End Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); First End Thread Direction: RIGHT-HAND; Temp Rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF. 25 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.