The Gear,spur, cataloged under National Stock Number 3020-01-275-9145, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-275-9145 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.732 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.500 INCHES BOTH ENDS IN |
| Teeth Quantity | 26 |
| Body Style | PLAIN, SOLID |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.406 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.187 INCHES SECOND END IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 2.1865 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 6 BOTH ENDS |
| Nominal Outside Diameter | 2.342 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1144 OVERALL |
| Face Nominal Width | 0.510 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 |
| Reference | Meaning |
|---|---|
| 12193548 | 3/9 Design control — primary reference Bridgeport Machines Div of Textron Inc |
| 19-0137 | D/9 Drawing number reference only Bridgeport Machines Div of Textron Inc |
| 2190137 | 5/9 Secondary reference Bridgeport Machines Div of Textron Inc |
NSN 3020-01-275-9145 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 7930-01-412-2383. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-275-9145: Bore Nominal Diameter: 0.732 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.500 INCHES BOTH ENDS IN; Teeth Quantity: 26; Body Style: PLAIN, SOLID. 16 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.