The Gear,internal, cataloged under National Stock Number 3020-00-776-7640, 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 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-776-7640 |
| Primary Part Number | 8892720 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Teeth Quantity | 70 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 12.251 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.406 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SPUR |
| Hardness Rating | 85.0 ROCKWELL SUPERFICIAL 15-N NOMINAL OVERALL |
| Nominal Overall Length | 1.531 INCHES IN |
| Style Designator | RECESSED RING |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 11.6667 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 14.0620 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Bolt Hole Circle Nominal Diameter | 13.125 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Counterbore Nominal Depth | 0.250 INCHES FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.250 INCHES FIRST END IN |
| Face Nominal Width | 1.281 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8892720 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 7767640 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 8892720 | 5/9 Secondary reference General Motors Corp |
| 3020007767640 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 8892720 | 5/9 Secondary reference Spalla Inc |
NSN 3020-00-776-7640 is a Gear,internal, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-776-7640 has 2 manufacturer part numbers on file: 8892720 (Allison Transmission Inc Dba Allison Transmission, Inc), 7767640 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8892720: Teeth Quantity: 70; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 12.251 INCHES FIRST END IN; Mounting Hole Nominal Diameter: 0.406 INCHES AXIALLY THROUGH BODY FIRST END IN. 19 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.
NSN 3020-00-776-7640 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.