The Valve,safety Relief, cataloged under National Stock Number 4820-01-381-4469, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sterling Hydraulics Inc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-381-4469 |
| Primary Part Number | A3A300ZN |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sterling Hydraulics Inc |
| Status | ACTIVE |
| Connection Style | PLAIN (SCREW-IN CARTRIDGE) ALL ENDS |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Maximum Operating Temp | 90.0 CELSIUS SINGLE RESPONSE DEGC |
| Media for Which Designed | HYDRAULIC FLUID, MINERAL BASE SINGLE RESPONSE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Opening Pressure Setting | 200.0 BAR |
| 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 |
|---|---|
| 010-01760/18 | Bewick Engineering Ltd (GBR) |
| A3A300ZN PRIMARY | Sterling Hydraulics Inc (USA) |
| 010-01760 REFERENCE 18 | Bewick Engineering Ltd (GBR) |
| A3A300ZN | Parker Hannifin Manufacturing Limited, Hydraulic Cartridge Systems Division - Europe (GBR) |
| P-012419 | Kongsberg Maritime Ltd Div Kongsberg Maritime (GBR) |
| Reference | Meaning |
|---|---|
| A3A300-Z-STD-N | 5/9 Secondary reference Sterling Hydraulics Inc |
| A3A3000-Z-STD-N | 5/9 Secondary reference Sterling Hydraulics Ltd (valve Division) |
| A3A300ZN | 5/9 Secondary reference Sterling Hydraulics Ltd (valve Division) |
| A3A300-Z-STD-N | 5/9 Secondary reference Parker Hannifin Manufacturing Limited, Hydraulic Cartridge Systems Division - Europe |
| A3A3000-Z-STD-N | 5/9 Secondary reference Parker Hannifin Manufacturing Limited, Hydraulic Cartridge Systems Division - Europe |
| A3A300-Z-STD-N | 5/9 Secondary reference Sterling Hydraulics Ltd (valve Division) |
NSN 4820-01-381-4469 is a Valve,safety Relief, manufactured by Sterling Hydraulics Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-381-4469 has 5 manufacturer part numbers on file: 010-01760/18 (Bewick Engineering Ltd), A3A300ZN (Sterling Hydraulics Inc), 010-01760 REFERENCE 18 (Bewick Engineering Ltd), A3A300ZN (Parker Hannifin Manufacturing Limited, Hydraulic Cartridge Systems Division - Europe), P-012419 (Kongsberg Maritime Ltd Div Kongsberg Maritime).
Key specifications for A3A300ZN: Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE; Maximum Operating Temp: 90.0 CELSIUS SINGLE RESPONSE DEGC. 7 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.