The Gear,bevel, cataloged under National Stock Number 3020-00-427-9769, 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 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-427-9769 |
| Primary Part Number | 6866985 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.5795 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.2814 INCHES SECOND END IN |
| Backlash Designation | GRADE B |
| Teeth Quantity | 44 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 54.8331 DEGREES |
| Tooth Direction | LEFT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Mounting Hole Type and Quantity | 12 PLAIN AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.7500 INCHES SECOND END IN |
| Mounting Hole Nominal Diameter | 0.0640 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SPIRAL |
| Hardness Rating | 58.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Overall Length | 1.5780 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Material Document and Classification | CAGE 73342,EMS 63962 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.3960 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 84 BOTH ENDS |
| Nominal Outside Diameter | 5.4500 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 3.6675 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Spline Pitch Diameter | 3.5000 INCHES NOMINAL BOTH ENDS IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.8500 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 |
|---|---|
| 6866985 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 3020-00-427-9769 is a Gear,bevel, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-427-9769 has 1 manufacturer part number on file: 6866985 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6866985: Bore Nominal Diameter: 3.5795 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.2814 INCHES SECOND END IN; Backlash Designation: GRADE B; Teeth Quantity: 44. 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.