The Valve,safety Relief, cataloged under National Stock Number 4820-01-267-8601, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-267-8601 |
| Primary Part Number | 251974 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| 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 |
|---|---|
| 251974 PRIMARY | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling (USA) |
| Reference | Meaning |
|---|---|
| 85817A | 5/9 Secondary reference Hyster-Yale Group, Inc. |
NSN 4820-01-267-8601 is a Valve,safety Relief, manufactured by Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-267-8601 has 1 manufacturer part number on file: 251974 (Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling).
Key specifications for 251974: Flow Control Device: DIAPHRAGM; Special Features: PENDING USER COORDINATION THIS ITEM TO BE REPLACED BY NSN 4820-01-267-8601,SOS S9C";USED ON ROLLER, PNEUMATIC,NSN 3895-01-013-3630. 1 specification is 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.