The Gear,internal, cataloged under National Stock Number 3020-01-214-9394, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-214-9394 |
| Primary Part Number | 23018139 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.100 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.420 INCHES FIRST END IN |
| Teeth Quantity | 54 |
| Body Style | PLAIN, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.350 INCHES FIRST END IN |
| Teeth Type | SPUR |
| Nominal Overall Length | 2.270 INCHES IN |
| Style Designator | SOLID BACK RING, PROTRUDING HUB, RECESSED HUB |
| Material Document and Classification | 66AISI/SAE4140H FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.1428 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 21 BOTH ENDS |
| Nominal Outside Diameter | 5.960 INCHES IN |
| Pressure Angle | 22.5000 DEGREES |
| Material | STEEL COMP 4140H OVERALL |
| Spline Pitch Diameter | 2.0000 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.270 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 3020-01-214-9394 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 3020-01-214-9394 has 2 manufacturer part numbers on file: 23018139 (Hema Disli Sanayi Ve Tic.a.s.), 23018139 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 23018139: Bore Nominal Diameter: 2.100 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.420 INCHES FIRST END IN; Teeth Quantity: 54; Body Style: PLAIN, SOLID. 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.
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.