The Valve,safety Relief, cataloged under National Stock Number 4820-01-347-6437, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Meggitt North Hollywood Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Meggitt North Hollywood Inc (CAGE 79318) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-347-6437 |
| Primary Part Number | 322895-18 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Meggitt North Hollywood Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 1B6391 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 322895-18 | Meggitt North Hollywood Inc (USA) |
| Reference | Meaning |
|---|---|
| 1B2741 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 322895-16 | 5/9 Secondary reference Meggitt North Hollywood Inc |
| 322895-12 | 5/9 Secondary reference Meggitt North Hollywood Inc |
| 322895-14 | 5/9 Secondary reference Helmerich and Payne Inc N G O Chemical Div |
NSN 4820-01-347-6437 is a Valve,safety Relief, manufactured by Meggitt North Hollywood Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-347-6437 has 2 manufacturer part numbers on file: 1B6391 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 322895-18 (Meggitt North Hollywood Inc).
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.