The Valve,ball, cataloged under National Stock Number 4820-01-628-0444, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-628-0444 |
| Primary Part Number | 509-8590750 REV-ITEM NO V-3 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Valve Size | 0.250 INCHES IN |
| Maximum Operating Temp | 366.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | CHROMATE |
| Face to Face Distance | 2.000 INCHES IN |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 33325K21 | Mcmaster-Carr Supply Co (USA) |
| 509-8590750 REV-ITEM NO V-3 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4820-01-628-0444 is a Valve,ball, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-628-0444 has 2 manufacturer part numbers on file: 33325K21 (Mcmaster-Carr Supply Co), 509-8590750 REV-ITEM NO V-3 (Naval Sea Systems Command).
Key specifications for 509-8590750 REV-ITEM NO V-3: Style Designator: STRAIGHT THRU; Valve Size: 0.250 INCHES IN; Maximum Operating Temp: 366.0 FAHRENHEIT SINGLE RESPONSE DEGF; Surface Treatment: CHROMATE. 7 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.