The Gear,helical, cataloged under National Stock Number 3020-01-423-4889, 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 Sew-Eurodrive Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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 | 3020-01-423-4889 |
| Primary Part Number | 16861 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sew-Eurodrive Inc |
| Status | ACTIVE |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-01-423-4889 is a Gear,helical, manufactured by Sew-Eurodrive Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-423-4889 has 2 manufacturer part numbers on file: 16861 (Sew-Eurodrive Inc), 16861 (Sew-Eurodrive, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2530-01-624-2614. Verify interchangeability with system specifications before substitution.
Key specifications for 16861: Bore Style: W/ KEYWAY BOTH ENDS; Style Designator: ONE PROTRUDING HUB, ONE FLUSH HUB; Special Features: USED IN PARALLEL (HELICAL) REDUCER R/RF 102/103A, SEW-EURODRIVE, INC. A; End Item Identification: WEAPONS SYSTEM STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 2 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.