The Ball,valve,ported, cataloged under National Stock Number 4820-01-370-0403, 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 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-370-0403 |
| Primary Part Number | 556-6405334FIND15 |
| Item Name | Ball,valve,ported |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Port Diameter | 0.880 INCHES NOMINAL IN |
| Spherical Diameter | 1.747 INCHES NOMINAL IN |
| Port Configuration | STRAIGHT |
| Material | STEEL COMP 304 |
| 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 |
|---|---|
| 556-6405334FIND15 PRIMARY | Naval Sea Systems Command (USA) |
| DF330687FIND15 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 556-6405334 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-370-0403 is a Ball,valve,ported, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-370-0403 has 2 manufacturer part numbers on file: 556-6405334FIND15 (Naval Sea Systems Command), DF330687FIND15 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 556-6405334FIND15: Port Diameter: 0.880 INCHES NOMINAL IN; Spherical Diameter: 1.747 INCHES NOMINAL IN; Port Configuration: STRAIGHT; Material: STEEL COMP 304. 4 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.