The Gear Sector,spur, cataloged under National Stock Number 3020-00-445-4889, 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 Gyrus Acmi L.p. Dba Circon-Acmi Div. Government technical data includes 9 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. 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 | 3020-00-445-4889 |
| Primary Part Number | 18027-3 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Gyrus Acmi L.p. Dba Circon-Acmi Div |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.266 INCHES BOTH ENDS IN |
| Teeth Quantity | 35 |
| Bore Style | PLAIN BOTH ENDS |
| Tooth Form | STANDARD |
| Arc Nominal Length | 1.1779 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.074 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 |
|---|---|
| 18027-3 PRIMARY | Gyrus Acmi L.p. Dba Circon-Acmi Div (USA) |
NSN 3020-00-445-4889 is a Gear Sector,spur, manufactured by Gyrus Acmi L.p. Dba Circon-Acmi Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-445-4889 has 1 manufacturer part number on file: 18027-3 (Gyrus Acmi L.p. Dba Circon-Acmi Div).
1 possible match (shared part number, not a government interchangeability claim): 3110-01-188-6898. Verify interchangeability with system specifications before substitution.
Key specifications for 18027-3: Bore Nominal Diameter: 0.266 INCHES BOTH ENDS IN; Teeth Quantity: 35; Bore Style: PLAIN BOTH ENDS; Tooth Form: STANDARD. 9 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.