The Gear,worm Wheel, cataloged under National Stock Number 3020-00-385-7976, 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 Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 3020-00-385-7976 |
| Primary Part Number | 8404001 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.061 INCHES BOTH ENDS IN |
| Helix Angle | 30.0000 DEGREES |
| Hub Nominal Diameter | 2.875 INCHES BOTH ENDS IN |
| Teeth Quantity | 37 |
| Body Style | SPOKED, OFFSET |
| Tooth Direction | LEFT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.487 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.519 INCHES FIRST END IN |
| Throat Nominal Radius | 0.729 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 5.8870 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 31 BOTH ENDS |
| Nominal Outside Diameter | 6.165 INCHES IN |
| Pressure Angle | 28.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Mating Thread Lead Quantity | 6 |
| Spline Pitch Diameter | 1.9375 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.968 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 |
|---|---|
| 8404001 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3020-00-385-7976 is a Gear,worm Wheel, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-385-7976 has 1 manufacturer part number on file: 8404001 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
1 possible match (shared part number, not a government interchangeability claim): 5962-01-680-9959. Verify interchangeability with system specifications before substitution.
Key specifications for 8404001: Bore Nominal Diameter: 2.061 INCHES BOTH ENDS IN; Helix Angle: 30.0000 DEGREES; Hub Nominal Diameter: 2.875 INCHES BOTH ENDS IN; Teeth Quantity: 37. 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.