The Gear,internal, cataloged under National Stock Number 3020-01-389-9652, 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 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-389-9652 |
| Primary Part Number | 801-6406709 FIND 62 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.719 INCHES FIRST END IN |
| Bore Nominal Diameter | 3.780 INCHES SECOND END IN |
| Teeth Quantity | 42 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 3.940 INCHES SECOND END IN |
| Flange Nominal Thickness | 0.750 INCHES IN |
| Flange Nominal Diameter | 5.320 INCHES IN |
| Bore Style | STRAIGHT SPLINE FIRST END |
| Bore Style | W/STEPPED COUNTERBORE SECOND END |
| First Step Nominal Length | 0.219 INCHES FIRST END IN |
| Teeth Type | SPUR |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 3.940 INCHES IN |
| Style Designator | FLANGED RING |
| Pitch Diameter | 4.2000 INCHES NOMINAL IN |
| Tooth Form | STUB |
| First Step Nominal Diameter | 4.498 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Spline Quantity | 8 FIRST END |
| End Nominal Length | 0.846 INCHES FIRST END IN |
| Nominal Outside Diameter | 5.342 INCHES IN |
| End Nominal Diameter | 3.500 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.219 INCHES SECOND END 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 |
|---|---|
| 801-6406709 FIND 62 PRIMARY | Naval Sea Systems Command (USA) |
| 211041106 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 801-6406709 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-389-9652 is a Gear,internal, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-389-9652 has 2 manufacturer part numbers on file: 801-6406709 FIND 62 (Naval Sea Systems Command), 211041106 (Naval Sea Systems Command).
5 possible matches (shared part number, not a government interchangeability claim): 3040-01-434-3371, 5365-01-529-3318, 3110-01-529-3326. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6406709 FIND 62: Bore Nominal Diameter: 1.719 INCHES FIRST END IN; Bore Nominal Diameter: 3.780 INCHES SECOND END IN; Teeth Quantity: 42; Body Style: PLAIN, SOLID. 25 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.