The Gear,helical, cataloged under National Stock Number 3020-00-702-7560, 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 Cummins Inc.. Government technical data includes 17 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 | 3020-00-702-7560 |
| Primary Part Number | 43866 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.873 INCHES BOTH ENDS IN |
| Helix Angle | 16.4554 DEGREES |
| Hub Nominal Diameter | 1.750 INCHES BOTH ENDS IN |
| Teeth Quantity | 30 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | FLUSH HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4340H ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.0625 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 4.318 INCHES IN |
| Material | STEEL COMP 4340H OVERALL |
| Face Nominal Width | 0.750 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 |
|---|---|
| 43866 PRIMARY | Cummins Inc. (USA) |
NSN 3020-00-702-7560 is a Gear,helical, manufactured by Cummins Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-702-7560 has 1 manufacturer part number on file: 43866 (Cummins Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-398-9147. Verify interchangeability with system specifications before substitution.
Key specifications for 43866: Bore Nominal Diameter: 0.873 INCHES BOTH ENDS IN; Helix Angle: 16.4554 DEGREES; Hub Nominal Diameter: 1.750 INCHES BOTH ENDS IN; Teeth Quantity: 30. 17 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.