The Gear,helical, cataloged under National Stock Number 3020-00-646-7035, 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 Am General Llc. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-646-7035 |
| Primary Part Number | 809291 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.315 INCHES BOTH ENDS IN |
| Helix Angle | 30.0000 DEGREES |
| Hub Nominal Diameter | 1.938 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.125 INCHES SECOND END IN |
| Teeth Quantity | 29 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.438 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 59.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.250 INCHES IN |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Material Document and Classification | 66 AISI/SAE 8620 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.6250 INCHES NOMINAL IN |
| Tooth Form | SPECIAL |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 12 FIRST END |
| Nominal Outside Diameter | 3.938 INCHES IN |
| Pressure Angle | 17.5000 DEGREES |
| Material | STEEL COMP 8620 OVERALL |
| Spline Pitch Diameter | 1.8438 INCHES NOMINAL FIRST END IN |
| Face Nominal Width | 0.812 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 |
NSN 3020-00-646-7035 is a Gear,helical, manufactured by Am General Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-646-7035 has 2 manufacturer part numbers on file: 809291 (Am General Llc), TC291 (Napco Intl Inc).
1 possible match (shared part number, not a government interchangeability claim): 5930-00-766-1043. Verify interchangeability with system specifications before substitution.
Key specifications for 809291: Bore Nominal Diameter: 1.315 INCHES BOTH ENDS IN; Helix Angle: 30.0000 DEGREES; Hub Nominal Diameter: 1.938 INCHES SECOND END IN; Nominal Distance Between Body Face and Recessed Hub End: 0.125 INCHES SECOND END IN. 23 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.