The Gear,spur, cataloged under National Stock Number 3020-01-383-5443, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-383-5443 |
| Primary Part Number | 801-6641189FNB6 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 5.560 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 7.500 INCHES BOTH ENDS IN |
| Teeth Quantity | 26 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN SECOND END |
| Bore Style | STRAIGHT SPLINE FIRST END |
| Mounting Hole Type and Quantity | 6 THREADED AXIALLY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 2.062 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.129 INCHES SECOND END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 8.6666 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 10 FIRST END |
| Mounting Hole Nominal Thread Size | 0.375 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Nominal Outside Diameter | 9.195 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 5.750 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 4.749 INCHES IN |
| 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 |
|---|---|
| 801-6641189FNA6 | Naval Sea Systems Command (USA) |
| 801-6641189FNB6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6641189 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-383-5443 is a Gear,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-383-5443 has 2 manufacturer part numbers on file: 801-6641189FNA6 (Naval Sea Systems Command), 801-6641189FNB6 (Naval Sea Systems Command).
Key specifications for 801-6641189FNB6: Bore Nominal Diameter: 5.560 INCHES BOTH ENDS IN; Hub Nominal Diameter: 7.500 INCHES BOTH ENDS IN; Teeth Quantity: 26; Body Style: PLAIN, SOLID. 21 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.