The Valve,safety Relief, cataloged under National Stock Number 4820-01-277-7522, 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 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-277-7522 |
| Primary Part Number | 0008603 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leroi International Inc Dba Compair Leroi |
| Status | ACTIVE |
| Opening Pressure Setting | 60.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 8603 | Leroi International Inc Dba Compair Leroi (USA) |
| 0008603 PRIMARY | Leroi International Inc Dba Compair Leroi (USA) |
| Reference | Meaning |
|---|---|
| 0008603 | 5/9 Secondary reference Compair Kellogg Div of Robertshaw Controls Co |
| 8603 | 5/9 Secondary reference Compair Kellogg Div of Robertshaw Controls Co |
NSN 4820-01-277-7522 is a Valve,safety Relief, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-277-7522 has 2 manufacturer part numbers on file: 8603 (Leroi International Inc Dba Compair Leroi), 0008603 (Leroi International Inc Dba Compair Leroi).
Key specifications for 0008603: Special Features: 0.250 IN. SIZE IN; Opening Pressure Setting: 60.0 POUNDS PER SQUARE INCH LBS. 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.