The Valve,back Pressure Relief, cataloged under National Stock Number 4820-01-061-3799, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-061-3799 |
| Item Name | Valve,back Pressure Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | PARTS LIST CONTAINS 1 BODY 75309,1 GUIDE 75307-1,1 RETAINER 75310,1 SCREW MS35214-55,1 ORING 79552-28,1 BUSHING 75313,1 SCREW MS90726-189,1 LOCKNUT AN316-12,1 SPRING D43,1 POPPET 76825,1 ORING 79550-23,1 WASHER MS35333-107 |
| 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 |
|---|---|
| 71-0003-01 | 3/9 Design control — primary reference Uni-Systems Inc |
NSN 4820-01-061-3799 is a Valve,back Pressure Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5980-01-107-9445. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-061-3799: General Characteristics Item Description: PARTS LIST CONTAINS 1 BODY 75309,1 GUIDE 75307-1,1 RETAINER 75310,1 SCREW MS35214-55,1 ORING 79552-28,1 BUSHING 75313,1 SCREW MS90726-189,1 LOCKNUT AN316-12,1 SPRING D43,1 POPPET 76825,1 ORING 79550-23,1 WASHER MS35333-107. 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.