The Gear,helical, cataloged under National Stock Number 3020-00-239-5504, 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 Nuttall Gear L L C. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Nuttall Gear L L C (CAGE 4W944) |
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-5504 |
| Primary Part Number | W416BBS-1X6 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Nuttall Gear L L C |
| 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 |
|---|---|
| W416BBS-1X6 PRIMARY | Nuttall Gear L L C (USA) |
| Reference | Meaning |
|---|---|
| G9991PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9997PC126 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G9764PC126 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| W416BBS1X6 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| W416BBS-1X6/046 | C/1 Advisory reference — outside the item-of-supply concept Siemens Energy, Inc. |
| G9764PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG2991PC126 | 5/9 Secondary reference Circor Pumps North America Llc |
| G7805PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9997PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9991PC126 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| SG2991PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9770PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7811PC126 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9770PC126 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
NSN 3020-00-239-5504 is a Gear,helical, manufactured by Nuttall Gear L L C, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-5504 has 1 manufacturer part number on file: W416BBS-1X6 (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.