The Gear,spur, cataloged under National Stock Number 3020-00-080-7021, 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 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-080-7021 |
| Primary Part Number | 6774671 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.750 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.0434 INCHES BOTH ENDS IN |
| Teeth Quantity | 60 |
| Body Style | WEBBED, SOLID |
| Counterbore Nominal Diameter | 2.4408 INCHES COUNTERBORE FIRST END IN |
| Counterbore Nominal Diameter | 2.8345 INCHES COUNTER BORE SECOND END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.120 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.750 INCHES FIRST END IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM HUB |
| Hardness Rating | 57.0 ROCKWELL C MINIMUM TEETH |
| Style Designator | BELL SHAPE BODY, PROTRUDING HUBS |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 10.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 10.345 INCHES IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 5150 OVERALL |
| Counterbore Nominal Depth | 0.590 INCHES BOTH ENDS IN |
| Face Nominal Width | 0.620 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 |
NSN 3020-00-080-7021 is a Gear,spur, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-080-7021 has 2 manufacturer part numbers on file: 6774671 (Allison Transmission Inc Dba Allison Transmission, Inc), D47456 (Cnh Industrial America Llc Dba Cnh America).
Key specifications for 6774671: Bore Nominal Diameter: 1.750 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.0434 INCHES BOTH ENDS IN; Teeth Quantity: 60; Body Style: WEBBED, SOLID. 21 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.