The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-570-4933, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Haldex Brake Products Corporation. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-570-4933 |
| Primary Part Number | N1178EE |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Haldex Brake Products Corporation |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Body Style | STRAIGHT THRU |
| Material | COPPER ALLOY AND STEEL CORROSION RESISTING 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 |
|---|---|
| N1178EE PRIMARY | Haldex Brake Products Corporation (USA) |
| Reference | Meaning |
|---|---|
| 4183974 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 4820-01-570-4933 is a Valve,relief,pressure and Temper, manufactured by Haldex Brake Products Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-570-4933 has 1 manufacturer part number on file: N1178EE (Haldex Brake Products Corporation).
Key specifications for N1178EE: Flow Control Device: NEEDLE; Body Style: STRAIGHT THRU; Special Features: BODY STYLE: CLOSED; THREAD SIZE: 3/8"; PSI: 175; Part Name Assigned by Controlling Agency: PRESSURE RELIEF VALVE. 3 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.