The Release Valve, cataloged under National Stock Number 4820-01-263-8923, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hein Werner Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Release Valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Hein Werner Corp (CAGE 28047) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-263-8923 |
| Primary Part Number | 22170 |
| Item Name | Release Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hein Werner Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 22170 PRIMARY | Hein Werner Corp (USA) |
NSN 4820-01-263-8923 is a Release Valve, manufactured by Hein Werner Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-263-8923 has 1 manufacturer part number on file: 22170 (Hein Werner Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5940-01-291-5961, 4730-01-352-2272. 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.