The Gear,helical, cataloged under National Stock Number 3020-00-385-9485, 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 Siemens Energy, 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through both NSN and commercial part number lookups. 30 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-385-9485 |
| Primary Part Number | W97AS2 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.249 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.000 INCHES BOTH ENDS IN |
| Helix Angle | 15.0300 DEGREES |
| Teeth Quantity | 18 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Criticality Code Justification | FEAT |
| Style Designator | HUBLESS |
| Material Document and Classification | MIL-M-16576-CANCELED MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 2.212 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.625 INCHES BOTH ENDS IN |
| Pressure Angle | 22.5000 DEGREES |
| Material | COPPER ALLOY 903 OVERALL |
| Face Nominal Width | 1.748 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| W97AS2 PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| G9759PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7803PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9848PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9747PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7907PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| S2425JB | C/1 Advisory reference — outside the item-of-supply concept Siemens Energy, Inc. |
| G9823PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7796PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG3109PC135 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7900PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9928PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9816PC121 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9923PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9974PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9818PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9752PC112 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7895PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9921PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
| W97AS2 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9981PC117 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3020-00-385-9485 is a Gear,helical, manufactured by Siemens Energy, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-385-9485 has 1 manufacturer part number on file: W97AS2 (Siemens Energy, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-266-8232. Verify interchangeability with system specifications before substitution.
Key specifications for W97AS2: Keyway Nominal Width: 0.249 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.000 INCHES BOTH ENDS IN; Helix Angle: 15.0300 DEGREES; Teeth Quantity: 18. 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.