The Gear Operator,valve, cataloged under National Stock Number 4820-01-446-5079, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-446-5079 |
| Primary Part Number | 512-6404652-AY93 |
| Item Name | Gear Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 512-6404652-AY93 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6404652 | D/9 Drawing number reference only Naval Sea Systems Command |
| 211045128 | 3/2 Design control — primary reference U.S. Government activity |
| DF6503-173 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| DF6503-173 ASSY 93 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-446-5079 is a Gear Operator,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-446-5079 has 1 manufacturer part number on file: 512-6404652-AY93 (Naval Sea Systems Command).
Key specifications for 512-6404652-AY93: Special Features: CROSS-CONNECT HYDRAULIC VALVE OUTBOARD OPERATOR ASSY.;PART OF AIR INDUCTION AND DIESEL EXHAUST VALVES OPERATING GEAR & GAGGING GEAR ASSY; End Item Identification: SEAWOLF CLASS SUBMARINE SSN. 0 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.