The Valve,safety Relief, cataloged under National Stock Number 4820-01-351-2933, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leroi International Inc Dba Compair Leroi. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-351-2933 |
| Primary Part Number | 56289 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leroi International Inc Dba Compair Leroi |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 56289 PRIMARY | Leroi International Inc Dba Compair Leroi (USA) |
| Reference | Meaning |
|---|---|
| 56289 | 5/9 Secondary reference Compair Kellogg Div of Robertshaw Controls Co |
NSN 4820-01-351-2933 is a Valve,safety Relief, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-351-2933 has 1 manufacturer part number on file: 56289 (Leroi International Inc Dba Compair Leroi).
Key specifications for 56289: Style Designator: STRAIGHT THRU; End Item Identification: 3431-01-090-1231; Valve Operation Method: AUTOMATIC. 2 specifications are 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.