The Valve,safety Relief, cataloged under National Stock Number 4820-01-301-7297, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Johnson Controls Ltd, York Navy Systems. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Johnson Controls Ltd, York Navy Systems (CAGE U2692) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-301-7297 |
| Primary Part Number | 226L68260-M00 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Johnson Controls Ltd, York Navy Systems |
| 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 |
|---|---|
| 226L68260-M00 | Johnson Controls Ltd, York Navy Systems (GBR) |
| Reference | Meaning |
|---|---|
| 5231A | 5/1 Secondary reference Johnson Controls Ltd, York Navy Systems |
| 527 | 5/1 Secondary reference Henry Technologies Limited |
| 5231-A 20.7 BAR | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-01-301-7297 is a Valve,safety Relief, manufactured by Johnson Controls Ltd, York Navy Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-301-7297 has 1 manufacturer part number on file: 226L68260-M00 (Johnson Controls Ltd, York Navy Systems).
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.