The Gear Sector,spur, cataloged under National Stock Number 3020-01-026-7889, 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 Gear Manufacturing, Inc. Dba Gear Manufacturing Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-026-7889 |
| Primary Part Number | 2535874 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Gear Manufacturing, Inc. Dba Gear Manufacturing Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 4.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 6.188 INCHES FIRST END IN |
| Teeth Quantity | 160 |
| Nominal Outside Radius | 6.737 INCHES IN |
| Counterbore Nominal Diameter | 5.625 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Mounting Hole Type and Quantity | 9 PLAIN AND 2 COUNTERSUNK AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 6.188 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.281 INCHES AND 0.312 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hardness Rating | 89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM TEETH |
| Material Document and Classification | AMS6260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN FIRST END |
| Pitch Radius | 6.6667 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Bolt Hole Circle Nominal Diameter | 6.750 INCHES AND 6.625 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Counterbore Nominal Depth | 0.500 INCHES FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.125 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2535874 PRIMARY | Gear Manufacturing, Inc. Dba Gear Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| 2535874 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-01-026-7889 is a Gear Sector,spur, manufactured by Gear Manufacturing, Inc. Dba Gear Manufacturing Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-026-7889 has 1 manufacturer part number on file: 2535874 (Gear Manufacturing, Inc. Dba Gear Manufacturing Inc).
Key specifications for 2535874: Bore Nominal Diameter: 4.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 6.188 INCHES FIRST END IN; Teeth Quantity: 160; Nominal Outside Radius: 6.737 INCHES IN. 19 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.
NSN 3020-01-026-7889 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.