The Valve,safety Relief, cataloged under National Stock Number 4820-01-477-5212, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Safran Electronics & Defense. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-477-5212 |
| Primary Part Number | 444-11065-445 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Safran Electronics & Defense |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 444-11065-445 | Safran Electronics & Defense (FRA) |
| 533B1M89 | Les Automatismes Appliques (FRA) |
| Reference | Meaning |
|---|---|
| 533B-1M-89 | 3/2 Design control — primary reference U.S. Government activity |
| 444-11065-445 | 5/9 Secondary reference Sfim Industries |
| 444-11065-445 | 5/9 Secondary reference Safran Electronics & Defense (ex Aviac Technologies) |
| 444-11065-445 | 5/9 Secondary reference Safran |
NSN 4820-01-477-5212 is a Valve,safety Relief, manufactured by Safran Electronics & Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-477-5212 has 2 manufacturer part numbers on file: 444-11065-445 (Safran Electronics & Defense), 533B1M89 (Les Automatismes Appliques).
Key specifications for 444-11065-445: Style Designator: STRAIGHT THRU; Special Features: ZERO-LEAK; TAMPER PROOF ADJUSTMENT; O-RING MATERIAL NEOPRENE; TEMPERATURE RANGE -40 TO +250 DEGREES F; Material: COPPER ALLOY BODY. 2 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.