The Valve,ball, cataloged under National Stock Number 4820-01-499-1378, 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 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-499-1378 |
| Primary Part Number | 566-6405334 ASSY 69 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 566-6405334 ASSY 69 PRIMARY | Naval Sea Systems Command (USA) |
| DF330687 ASSY 69 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| DF330687 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6405334 | D/9 Drawing number reference only Naval Sea Systems Command |
| 556-6405334 ASS | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-499-1378 is a Valve,ball, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-499-1378 has 2 manufacturer part numbers on file: 566-6405334 ASSY 69 (Naval Sea Systems Command), DF330687 ASSY 69 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 566-6405334 ASSY 69: Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: SOCKET ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 6 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.