The Valve,check, cataloged under National Stock Number 4820-01-176-6733, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Haldex Brake Products Corporation (CAGE 06721) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-176-6733 |
| Primary Part Number | KN25080 |
| Item Name | Valve,check |
| 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 |
|---|---|
| N20966A | Haldex Brake Products Corporation (USA) |
| KN25080 PRIMARY | Haldex Brake Products Corporation (USA) |
| Reference | Meaning |
|---|---|
| XN20954N | 5/9 Secondary reference Grimes Aerospace Company |
| N20954N | 5/9 Secondary reference Grimes Aerospace Company |
| N20966E | 5/9 Secondary reference Haldex Brake Products Corporation |
NSN 4820-01-176-6733 is a Valve,check, manufactured by Haldex Brake Products Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-176-6733 has 2 manufacturer part numbers on file: N20966A (Haldex Brake Products Corporation), KN25080 (Haldex Brake Products Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-645-2144. 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.