The Gear,worm Wheel, cataloged under National Stock Number 3020-01-310-4337, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-310-4337 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.125 INCHES BOTH ENDS IN |
| Helix Angle | 18.5666 DEGREES |
| Teeth Quantity | 40 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Throat Nominal Radius | 0.125 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 6.3120 INCHES NOMINAL IN |
| Spline Quantity | 10 BOTH ENDS |
| Nominal Outside Diameter | 6.560 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY 905 OVERALL |
| Face Nominal Width | 1.438 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 |
| Reference | Meaning |
|---|---|
| 2640-059 PIECE 3 | 5/2 Secondary reference U.S. Government activity |
| 1889808 PIECE 3 | 3/2 Design control — primary reference U.S. Government activity |
| 1889808 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-310-4337 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-310-6603. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-310-4337: Bore Nominal Diameter: 1.125 INCHES BOTH ENDS IN; Helix Angle: 18.5666 DEGREES; Teeth Quantity: 40; Body Style: WEBBED, SOLID. 15 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.