The Gear,helical, cataloged under National Stock Number 3020-00-239-5502, 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.. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Gear,helical |
| FSC / FSG | 3020 — Gears, Pulleys, Sprockets, and Transmission Chain (FSG 30) |
| Manufacturers | Siemens Energy, Inc. (CAGE 16712); Nuttall Gear L L C (CAGE 4W944) |
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-5502 |
| Primary Part Number | G7797PC127 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| G7797PC127 PRIMARY | Siemens Energy, Inc. (USA) |
| G7791PC127 PRIMARY | Siemens Energy, Inc. (USA) |
| W419BSX3 PRIMARY | Nuttall Gear L L C (USA) |
| Reference | Meaning |
|---|---|
| G9747PC127 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9980PC127 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9974PC127 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9980PC127 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9747PC127 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9753PC127 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| W416BSX3 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9974PC127 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9753PC127 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3020-00-239-5502 is a Gear,helical, manufactured by Siemens Energy, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-5502 has 3 manufacturer part numbers on file: G7797PC127 (Siemens Energy, Inc.), G7791PC127 (Siemens Energy, Inc.), W419BSX3 (Nuttall Gear L L C).
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.