The Gear,worm Wheel, cataloged under National Stock Number 3020-00-740-9934, 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 U S Army Tank Automotive Command Amsta-Im-Mm. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-740-9934 |
| Primary Part Number | 7409934 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Keyway Nominal Width | 0.748 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.998 INCHES BOTH ENDS IN |
| Helix Angle | 5.0664 DEGREES |
| Hub Nominal Diameter | 4.562 INCHES BOTH ENDS IN |
| Teeth Quantity | 30 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ 2 KEYWAYS BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.437 INCHES BOTH ENDS IN |
| Throat Nominal Radius | 1.541 INCHES IN |
| Face Type | CONCAVE |
| Hardness Rating | 83.0 BRINELL STANDARD NOMINAL OVERALL |
| Nominal Overall Length | 3.875 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 11.4590 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 12.5000 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.8355 INCHES BOTH ENDS IN |
| Pressure Angle | 27.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Mating Thread Lead Quantity | 1 |
| Face Nominal Width | 3.062 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 3020-00-740-9934 is a Gear,worm Wheel, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-740-9934 has 2 manufacturer part numbers on file: 7409934 (U S Army Tank Automotive Command Amsta-Im-Mm), M305805 (Garwood/feller Inc Garwood Winch Div).
Key specifications for 7409934: Keyway Nominal Width: 0.748 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.998 INCHES BOTH ENDS IN; Helix Angle: 5.0664 DEGREES; Hub Nominal Diameter: 4.562 INCHES BOTH ENDS 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.