The Valve,safety Relief, cataloged under National Stock Number 4820-00-918-5565, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rolls-Royce Solutions America Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-918-5565 |
| Primary Part Number | 5122895 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Flange Shape | OVAL WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Nominal Length | 3.292 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 2.400 INCHES FIRST END IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE |
| Bolt Hole Nominal Diameter | 0.404 INCHES FIRST END IN |
| Bolt Hole Quantity | 2 FIRST END |
| Nominal Width | 1.460 INCHES FIRST END IN |
| Material | STEEL OVERALL |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.338 INCHES FIRST END IN |
| 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 |
|---|---|
| 5122895 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| Reference | Meaning |
|---|---|
| 482009185565 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 4860009185565 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 5122895 | 5/9 Secondary reference General Motors Corp |
NSN 4820-00-918-5565 is a Valve,safety Relief, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-918-5565 has 1 manufacturer part number on file: 5122895 (Rolls-Royce Solutions America Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-398-8415. Verify interchangeability with system specifications before substitution.
Key specifications for 5122895: Flow Control Device: PISTON; Flange Shape: OVAL WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Nominal Length: 3.292 INCHES FIRST END IN. 13 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.