The Gear,bevel, cataloged under National Stock Number 3020-01-281-5989, 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 Altra Industrial Motion Corp.. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-281-5989 |
| Primary Part Number | HL146Y-G |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.125 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.125 INCHES FIRST END IN |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 3.3790 DEGREES |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.563 INCHES FIRST END IN |
| Teeth Type | SKEW |
| Nominal Overall Length | 0.750 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Pitch Diameter | 1.5000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Nominal Thread Size | 0.250 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Nominal Outside Diameter | 1.560 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.310 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.250 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 |
|---|---|
| 0740474 | General Dynamics European, Land-Systems-Mowag Gmbh Dba Gdels (CHE) |
| HL146Y-G PRIMARY | Altra Industrial Motion Corp. (USA) |
| 6288935 | A V Technology Llc (USA) |
| Reference | Meaning |
|---|---|
| 6288935 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 3020-01-281-5989 is a Gear,bevel, manufactured by Altra Industrial Motion Corp., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-281-5989 has 3 manufacturer part numbers on file: 0740474 (General Dynamics European, Land-Systems-Mowag Gmbh Dba Gdels), HL146Y-G (Altra Industrial Motion Corp.), 6288935 (A V Technology Llc).
Key specifications for HL146Y-G: Keyway Nominal Width: 0.125 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.125 INCHES FIRST END IN; Teeth Quantity: 24. 22 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.