The Valve,safety Relief, cataloged under National Stock Number 4820-01-074-6922, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lockheed Martin Corporation Div Rms. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (CAGE 10001); Lockheed Martin Corporation Div Rms (CAGE 02769) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-074-6922 |
| Primary Part Number | 3146060-1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| 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 |
|---|---|
| 3146060-1 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 3146060-1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 781476-1 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms |
| 4820PL0951083 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 781476-001 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 3146060 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 781476-1 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 4820-01-074-6922 is a Valve,safety Relief, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-074-6922 has 2 manufacturer part numbers on file: 3146060-1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 3146060-1 (Lockheed Martin Corporation Div Rms).
1 possible match (shared part number, not a government interchangeability claim): 2590-01-696-4968. Verify interchangeability with system specifications before substitution.
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.