The Gear,helical, cataloged under National Stock Number 3020-00-249-9905, 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 Wisconsin Motors, Llc. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-249-9905 |
| Primary Part Number | GA39 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Wisconsin Motors, Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.1555 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.3745 INCHES BOTH ENDS IN |
| Helix Angle | 0.3999 DEGREES |
| Hub Nominal Diameter | 2.000 INCHES FIRST END IN |
| Teeth Quantity | 27 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.405 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | FED STD 66/AISI C1113 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.4140 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 2.5775 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.770 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.877 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 |
|---|---|
| 460D1-0544 | Kurz & Root Generator Company, Llc (USA) |
| GA39 PRIMARY | Wisconsin Motors, Llc (USA) |
| Reference | Meaning |
|---|---|
| 18621 | 5/2 Secondary reference U.S. Government activity |
| 1021-355 | 5/9 Secondary reference Szemco Inc |
| JHP33-52 | 5/9 Secondary reference Hollingsworth John R Co |
NSN 3020-00-249-9905 is a Gear,helical, manufactured by Wisconsin Motors, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-249-9905 has 2 manufacturer part numbers on file: 460D1-0544 (Kurz & Root Generator Company, Llc), GA39 (Wisconsin Motors, Llc).
5 possible matches (shared part number, not a government interchangeability claim): 5950-00-583-4988, 5340-00-943-2118, 5330-01-076-9857. Verify interchangeability with system specifications before substitution.
Key specifications for GA39: Keyway Nominal Width: 0.1555 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.3745 INCHES BOTH ENDS IN; Helix Angle: 0.3999 DEGREES; Hub Nominal Diameter: 2.000 INCHES FIRST END IN. 20 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.