The Gear,spur, cataloged under National Stock Number 3020-00-042-4285, 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 Meritor Heavy Vehicle Systems, Llc. Government technical data includes 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-042-4285 |
| Primary Part Number | 3492H138 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.625 INCHES BOTH ENDS IN |
| Teeth Quantity | 53 |
| Second Step Nominal Diameter | 1.500 INCHES FIRST END IN |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.313 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES SECOND END IN |
| First Step Nominal Length | 0.688 INCHES FIRST END IN |
| First Step Nominal Length | 0.156 INCHES SECOND END IN |
| Second Step Nominal Length | 0.031 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 6.6250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 5.500 INCHES SECOND END IN |
| First Step Nominal Diameter | 1.182 INCHES FIRST END IN |
| Hub Style Designator | 2 STEPS FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 9 BOTH ENDS |
| End Nominal Length | 1.000 INCHES FIRST END IN |
| End Nominal Length | 0.031 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.875 INCHES IN |
| End Nominal Diameter | 1.250 INCHES SECOND END IN |
| End Nominal Diameter | 1.150 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | IRON CAST OVERALL |
| Spline Pitch Diameter | 0.5625 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.500 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 |
|---|---|
| 3492H138 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 165617 | 5/9 Secondary reference Komatsu American Intl Co |
NSN 3020-00-042-4285 is a Gear,spur, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-042-4285 has 1 manufacturer part number on file: 3492H138 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for 3492H138: Bore Nominal Diameter: 0.625 INCHES BOTH ENDS IN; Teeth Quantity: 53; Second Step Nominal Diameter: 1.500 INCHES FIRST END IN; Body Style: WEBBED, OFFSET, SOLID. 27 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.