The Gear,helical, cataloged under National Stock Number 3020-00-166-4243, 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 Komatsu America Corp.. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-166-4243 |
| Primary Part Number | 728427 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.500 INCHES BOTH ENDS IN |
| Helix Angle | 30.0000 DEGREES |
| Hub Nominal Diameter | 2.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 23 |
| Body Style | WEBBED, SOLID |
| Counterbore Nominal Diameter | 1.522 INCHES COUNTERBORE FIRST END IN |
| Tooth Direction | RIGHT |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Bore Style | STRAIGHT SPLINE SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.410 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 5.4375 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 10 SECOND END |
| Nominal Outside Diameter | 5.562 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.438 INCHES COUNTERBORE FIRST END IN |
| Face Nominal Width | 1.500 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 |
|---|---|
| 728427 PRIMARY | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 728427 | 5/9 Secondary reference American Standard Inc Westinghouse Air Brake Co Div |
NSN 3020-00-166-4243 is a Gear,helical, manufactured by Komatsu America Corp., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-166-4243 has 1 manufacturer part number on file: 728427 (Komatsu America Corp.).
Key specifications for 728427: Bore Nominal Diameter: 1.500 INCHES BOTH ENDS IN; Helix Angle: 30.0000 DEGREES; Hub Nominal Diameter: 2.250 INCHES BOTH ENDS IN; Teeth Quantity: 23. 20 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.