The Valve,check, cataloged under National Stock Number 4820-01-596-7954, 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5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-596-7954 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| 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 |
|---|---|
| DT-500-MFMF-5 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division |
| DT-500-MFMF-5 | 5/9 Secondary reference U.S. Government activity |
| DT-500-MFMF-5 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-596-7954 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-596-7954: Connection Style: FLARED (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Seat Angle: 37.0 DEGREES ALL ENDS; Material: STEEL OVERALL. 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.