The Disk,valve, cataloged under National Stock Number 4820-01-025-6254, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-025-6254 |
| Primary Part Number | A7631.002-3-4IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Shank Diameter | 0.500 INCHES NOMINAL IN |
| Flange Diameter | 1.182 INCHES NOMINAL IN |
| Nominal Thread Size | 0.313 INCHES IN |
| Thread Class | 3A A |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 7339-1.050PC6-3-4IN | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| A7631.002-3-4IN PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| Reference | Meaning |
|---|---|
| 7339-1 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 7339-1.050PC6-3 | C/1 Advisory reference — outside the item-of-supply concept Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-025-6254 is a Disk,valve, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-025-6254 has 2 manufacturer part numbers on file: 7339-1.050PC6-3-4IN (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), A7631.002-3-4IN (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-630-7882. Verify interchangeability with system specifications before substitution.
Key specifications for A7631.002-3-4IN: Shank Diameter: 0.500 INCHES NOMINAL IN; Flange Diameter: 1.182 INCHES NOMINAL IN; Overall Height: 1.540 INCHES NOMINAL IN; Nominal Thread Size: 0.313 INCHES IN. 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.