The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-498-9310, 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 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-498-9310 |
| Primary Part Number | 98D178-6-7 |
| Item Name | Parts Kit,ball Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Component Quantity | 2 |
| Supply Items and Quantities | 4820-01-450-9590 SEAT,VALVE 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 98D178-6-7 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 6397426-A ITEM 6,7 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 6397426-A ITEM | C/1 Advisory reference — outside the item-of-supply concept Derbyshire Machine & Tool Co |
| 803-6397426-A ITEM 6,7 | 5/9 Secondary reference Naval Sea Systems Command |
| 6397426-A | D/9 Drawing number reference only Derbyshire Machine & Tool Co |
NSN 4820-01-498-9310 is a Parts Kit,ball Valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-498-9310 has 2 manufacturer part numbers on file: 98D178-6-7 (Derbyshire Machine & Tool Co), 6397426-A ITEM 6,7 (Derbyshire Machine & Tool Co).
Key specifications for 98D178-6-7: Component Quantity: 2; Supply Items and Quantities: 4820-01-450-9590 SEAT,VALVE 1; End Item Identification: E/I:VALVE,BALL 4 INCH AIR ACTUATED. IN. 2 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 4820-01-498-9310 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.