The Gear,helical, cataloged under National Stock Number 3020-00-249-9909, 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 Power Generation Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-249-9909 |
| Primary Part Number | W2C12081B |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Cummins Power Generation Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.094 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Helix Angle | 23.0333 DEGREES |
| Hub Nominal Diameter | 0.875 INCHES BOTH ENDS IN |
| Teeth Quantity | 22 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 1.9910 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 2.158 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.297 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | IRON OVERALL |
| Face Nominal Width | 0.500 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 |
|---|---|
| W2C12081B PRIMARY | Cummins Power Generation Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12081B | 5/9 Secondary reference Cummins Power Generation Inc. |
| 120-324 | 5/9 Secondary reference Cummins Power Generation Inc. |
| 120A324 | 5/9 Secondary reference Cummins Power Generation Inc. |
NSN 3020-00-249-9909 is a Gear,helical, manufactured by Cummins Power Generation Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-249-9909 has 1 manufacturer part number on file: W2C12081B (Cummins Power Generation Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-00-632-3776. Verify interchangeability with system specifications before substitution.
Key specifications for W2C12081B: Keyway Nominal Width: 0.094 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Helix Angle: 23.0333 DEGREES; Hub Nominal Diameter: 0.875 INCHES BOTH ENDS IN. 18 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.