The Gear,internal, cataloged under National Stock Number 3020-00-730-6612, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-730-6612 |
| Primary Part Number | 8351594 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.7500 INCHES BOTH ENDS IN |
| Teeth Quantity | 65 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 3.1500 INCHES FIRST END IN |
| First Step Nominal Length | 0.2600 INCHES FIRST END IN |
| Teeth Type | SPUR |
| Hardness Rating | 85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM OVERALL |
| Nominal Overall Length | 5.4100 INCHES IN |
| Style Designator | SOLID BACK RING, PROTRUDING HUB, RECESSED HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.1250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 5.7500 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Spline Quantity | 42 BOTH ENDS |
| End Nominal Length | 2.8900 INCHES FIRST END IN |
| Nominal Outside Diameter | 9.1200 INCHES IN |
| End Nominal Diameter | 3.2500 INCHES FIRST END IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Spline Pitch Diameter | 2.6250 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.380 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 |
|---|---|
| 8351594 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 8351594 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| 3020007306612 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 3020-00-730-6612 is a Gear,internal, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-730-6612 has 2 manufacturer part numbers on file: 8351594 (U S Army Tank Automotive Command Amsta-Im-Mm), 8351594 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 8351594: Bore Nominal Diameter: 2.7500 INCHES BOTH ENDS IN; Teeth Quantity: 65; Body Style: WEBBED, OFFSET, SOLID; Bore Style: INVOLUTE SPLINE BOTH ENDS. 23 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.