The Valve,ball, cataloged under National Stock Number 4820-01-239-8928, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-239-8928 |
| Primary Part Number | 2285-300 ASSY AT |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RECESSED STRAIGHT ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | CROSS FLANGED ENDS |
| Valve Size | 4.000 INCHES IN |
| Nominal Outside Diameter | 8.688 INCHES FIRST END IN |
| Nominal Outside Diameter | 7.438 INCHES SECOND END IN |
| Nominal Outside Diameter | 8.688 INCHES THIRD END IN |
| Bolt Hole Quantity | 10 FIRST END |
| Bolt Hole Quantity | 8 SECOND END |
| Bolt Hole Quantity | 10 THIRD END |
| Face to Face Distance | 15.000 INCHES IN |
| First Connection Face to Centerline Distance | 8.250 INCHES IN |
| Material | COPPER BODY |
| Material | TITANIUM FLOW CONTROL DEVICE |
| Material | NICKEL AND ALUMINUM AND COPPER ALLOY STEM |
| Nominal Thickness | 1.375 INCHES SECOND END IN |
| Nominal Thickness | 1.438 INCHES FIRST END IN |
| Nominal Thickness | 1.438 INCHES THIRD END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2285-300 ASSY AT PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 2285-300 ASSY AT PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 2285-300 ASSY AT PRIMARY | Jarecki Industries Ltd (USA) |
| 2285-300 ASSY AT PRIMARY | Portland Valve Llc (USA) |
| Reference | Meaning |
|---|---|
| 2285-300 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-239-8928 is a Valve,ball, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-239-8928 has 4 manufacturer part numbers on file: 2285-300 ASSY AT (Derbyshire Machine & Tool Co), 2285-300 ASSY AT (Huntington Ingalls Inc Div Newport News Shipbuilding), 2285-300 ASSY AT (Jarecki Industries Ltd), 2285-300 ASSY AT (Portland Valve Llc).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-544-8837. Verify interchangeability with system specifications before substitution.
Key specifications for 2285-300 ASSY AT: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RECESSED STRAIGHT ALL ENDS; Connection Type: FLANGE ALL ENDS; Style Designator: CROSS FLANGED ENDS. 19 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 4820-01-239-8928 has DEMIL Code B. 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.