The Valve,safety Relief, cataloged under National Stock Number 4820-01-285-6158, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-285-6158 |
| Primary Part Number | 415454-A1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.875 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Thread Class | 2A ALL ENDS A |
| Material | STEEL BODY |
| Thread Series Designator | UNF ALL ENDS |
| Opening Pressure Setting | 1900.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 415454-A1 PRIMARY | Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems (USA) |
NSN 4820-01-285-6158 is a Valve,safety Relief, manufactured by Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-285-6158 has 1 manufacturer part number on file: 415454-A1 (Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems).
Key specifications for 415454-A1: Flow Control Device: DISK; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE. 12 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.