The Gear,helical, cataloged under National Stock Number 3020-01-082-6538, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-082-6538 |
| Primary Part Number | 3892-S-3945 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.100 INCHES BOTH ENDS IN |
| Helix Angle | 25.0000 DEGREES |
| Hub Nominal Diameter | 2.844 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.156 INCHES SECOND END IN |
| Teeth Quantity | 31 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE FLUSH HUB, ONE RECESSED HUB |
| Pitch Diameter | 6.5000 INCHES NOMINAL IN |
| Tooth Form | SPECIAL |
| Features Provided | CASEHARDENED |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 41 BOTH ENDS |
| Nominal Outside Diameter | 6.8250 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 2.0500 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 2.281 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 |
|---|---|
| 3892-S-3945 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| 87979-A02T-43 | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 3892-S-3945 | C/1 Advisory reference — outside the item-of-supply concept Meritor Industrial Products, Llc |
NSN 3020-01-082-6538 is a Gear,helical, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-082-6538 has 2 manufacturer part numbers on file: 3892-S-3945 (Meritor Heavy Vehicle Systems, Llc), 87979-A02T-43 (Kovatch Corp.).
Key specifications for 3892-S-3945: Bore Nominal Diameter: 2.100 INCHES BOTH ENDS IN; Helix Angle: 25.0000 DEGREES; Hub Nominal Diameter: 2.844 INCHES SECOND END IN; Nominal Distance Between Body Face and Recessed Hub End: 0.156 INCHES SECOND END IN. 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.