The Valve,check, cataloged under National Stock Number 4820-01-535-6083, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-535-6083 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Material Document and Classification | MIL-B-16541 (INACTIVE) GRADE A MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.375 INCHES IN |
| Material | COPPER ALLOY BODY |
| 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 |
| Reference | Meaning |
|---|---|
| C-6375 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-535-6083 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-535-6083: Material Document and Classification: MIL-B-16541 (INACTIVE) GRADE A MIL SPEC SINGLE MATERIAL RESPONSE BODY; Operating Pressure: 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Size: 0.375 INCHES IN; Special Features: BRONZE CHECK LIFT VALVE; SPRING LOADED, W/OUT TAILPIECE; ITEM IS A CAL-VAL CO DRAWING C-6375 COMPONENT THAT HAS BEEN MODIFIED TO MEET REQUIREMENTS OF THE SSGN CONVERSION. 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.
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.