The Gear,helical, cataloged under National Stock Number 3020-00-858-0451, 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 Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 17 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 | 3020-00-858-0451 |
| Primary Part Number | 6860025 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.391 INCHES SECOND END IN |
| Bore Nominal Diameter | 0.575 INCHES FIRST END IN |
| Helix Angle | 29.5918 DEGREES |
| Teeth Quantity | 65 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN SECOND END |
| Bore Style | INVOLUTE SPLINE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.130 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 3.2500 INCHES NOMINAL IN |
| Spline Quantity | 23 FIRST END |
| Nominal Outside Diameter | 3.346 INCHES IN |
| Pressure Angle | 29.5918 DEGREES |
| Spline Pitch Diameter | 0.4792 INCHES NOMINAL FIRST END IN |
| Face Nominal Width | 0.345 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 |
|---|---|
| 6860025 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 3020-00-858-0451 is a Gear,helical, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-858-0451 has 1 manufacturer part number on file: 6860025 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6860025: Bore Nominal Diameter: 0.391 INCHES SECOND END IN; Bore Nominal Diameter: 0.575 INCHES FIRST END IN; Helix Angle: 29.5918 DEGREES; Teeth Quantity: 65. 17 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.