The Gear,spur, cataloged under National Stock Number 3020-01-019-4058, 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 The Boeing Company. Government technical data includes 29 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-019-4058 |
| Primary Part Number | A15D3740-1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.892 INCHES BOTH ENDS IN |
| Teeth Quantity | 42 |
| Second Step Nominal Diameter | 1.370 INCHES FIRST END IN |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Third Step Nominal Diameter | 1.250 INCHES FIRST END IN |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.540 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 2.010 INCHES FIRST END IN |
| First Step Nominal Length | 0.480 INCHES FIRST END IN |
| First Step Nominal Length | 0.040 INCHES SECOND END IN |
| Second Step Nominal Length | 0.180 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AMS6265 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.2000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 1.370 INCHES SECOND END IN |
| First Step Nominal Diameter | 1.819 INCHES FIRST END IN |
| Hub Style Designator | 3 STEPS FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 16 BOTH ENDS |
| End Nominal Length | 0.960 INCHES FIRST END IN |
| End Nominal Length | 0.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 4.402 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| End Nominal Diameter | 1.125 INCHES FIRST END IN |
| End Nominal Diameter | 1.819 INCHES SECOND END IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 0.8000 INCHES NOMINAL BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A15D3740-1 PRIMARY | The Boeing Company (USA) |
NSN 3020-01-019-4058 is a Gear,spur, manufactured by The Boeing Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-019-4058 has 1 manufacturer part number on file: A15D3740-1 (The Boeing Company).
Key specifications for A15D3740-1: Bore Nominal Diameter: 0.892 INCHES BOTH ENDS IN; Teeth Quantity: 42; Second Step Nominal Diameter: 1.370 INCHES FIRST END IN; Body Style: WEBBED, WITH LIGHTENING HOLES. 29 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 3020-01-019-4058 has DEMIL Code B. 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.