The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-237-5977, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Aerospace Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-237-5977 |
| Primary Part Number | 4348-1-000 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Aerospace Inc |
| Status | ACTIVE |
| Flow Control Device | ANY ACCEPTABLE |
| Body Style | STRAIGHT THRU |
| End Connection Quantity | 2 |
| Temp Adjustability | ADJUSTABLE |
| Media for Which Designed | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4348-1-000 PRIMARY | Circor Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| 4348-1-000 | 5/9 Secondary reference Acc Partners Inc |
| C10764-1 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-01-237-5977 is a Valve,relief,pressure and Temper, manufactured by Circor Aerospace Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-237-5977 has 1 manufacturer part number on file: 4348-1-000 (Circor Aerospace Inc).
Key specifications for 4348-1-000: Flow Control Device: ANY ACCEPTABLE; Body Style: STRAIGHT THRU; End Connection Quantity: 2; Temp Adjustability: ADJUSTABLE. 5 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.
NSN 4820-01-237-5977 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.