The Valve,safety Relief, cataloged under National Stock Number 4820-01-281-7858, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Haldex Brake Products Corporation. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Haldex Brake Products Corporation (CAGE 06721); Suunto Oy (CAGE A019G) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-281-7858 |
| Primary Part Number | KN31300 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Haldex Brake Products Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| KN31300 PRIMARY | Haldex Brake Products Corporation (USA) |
| 4900088 | Suunto Oy (FIN) |
| N1178AC | Haldex Brake Products Corporation (USA) |
| Reference | Meaning |
|---|---|
| 4900088 | 5/9 Secondary reference Gichner Systems Group Inc Gichner Mobilizer Div |
| N178 AC | 5/9 Secondary reference Haldex Brake Products Corporation |
NSN 4820-01-281-7858 is a Valve,safety Relief, manufactured by Haldex Brake Products Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-281-7858 has 3 manufacturer part numbers on file: KN31300 (Haldex Brake Products Corporation), 4900088 (Suunto Oy), N1178AC (Haldex Brake Products Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-322-7518. Verify interchangeability with system specifications before substitution.
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.