The Gear,spur, cataloged under National Stock Number 3020-01-422-1971, 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 26 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 | 3020-01-422-1971 |
| Primary Part Number | 29510171 |
| 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 | 1.160 INCHES SECOND END IN |
| Bore Nominal Diameter | 0.730 INCHES FIRST END IN |
| Hub Nominal Diameter | 1.379 INCHES FIRST END IN |
| Teeth Quantity | 22 |
| Body Style | WEBBED, SOLID |
| Bore Style | INVOLUTE SPLINE SECOND END |
| Bore Style | PLAIN FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.113 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.645 INCHES SECOND END IN |
| First Step Nominal Length | 0.412 INCHES SECOND END IN |
| Hardness Rating | 30.0 ROCKWELL C NOMINAL BORE SURFACE |
| Hardness Rating | 90.0 ROCKWELL SUPERFICIAL 15-N NOMINAL BODY |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 5.5000 INCHES NOMINAL IN |
| First Step Nominal Diameter | 3.300 INCHES SECOND END IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 17 SECOND END |
| End Nominal Length | 1.120 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.033 INCHES IN |
| Surface Treatment | CARBON OVERALL |
| End Nominal Diameter | 2.160 INCHES SECOND END IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 8625H OR STEEL COMP 8620H OVERALL |
| Spline Pitch Diameter | 1.0625 INCHES NOMINAL SECOND END IN |
| Face Nominal Width | 0.335 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 |
NSN 3020-01-422-1971 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 3020-01-422-1971 has 2 manufacturer part numbers on file: 29510171 (Allison Transmission Inc Dba Allison Transmission, Inc), 29510171 (Hema Disli Sanayi Ve Tic.a.s.).
Key specifications for 29510171: Bore Nominal Diameter: 1.160 INCHES SECOND END IN; Bore Nominal Diameter: 0.730 INCHES FIRST END IN; Hub Nominal Diameter: 1.379 INCHES FIRST END IN; Teeth Quantity: 22. 26 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 3020-01-422-1971 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.