The Gear,spur, cataloged under National Stock Number 3020-01-451-8911, 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 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-451-8911 |
| Primary Part Number | 12462248 |
| Item Name | Gear,spur |
| 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 | 2.230 INCHES FIRST END IN |
| Bore Nominal Diameter | 2.278 INCHES SECOND END IN |
| Teeth Quantity | 18 |
| Second Step Nominal Diameter | 3.130 INCHES SECOND END IN |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN FIRST END |
| Bore Style | PLAIN SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.594 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.026 INCHES FIRST END IN |
| First Step Nominal Length | 0.910 INCHES SECOND END IN |
| First Step Nominal Length | 0.126 INCHES FIRST END IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM TEETH |
| Second Step Nominal Length | 0.125 INCHES SECOND END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-46172 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.1429 INCHES NOMINAL IN |
| First Step Nominal Diameter | 2.756 INCHES SECOND END IN |
| First Step Nominal Diameter | 3.130 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | 2 STEPS SECOND END |
| End Nominal Length | 0.900 INCHES FIRST END IN |
| End Nominal Length | 0.559 INCHES SECOND END IN |
| Nominal Outside Diameter | 5.860 INCHES IN |
| End Nominal Diameter | 2.628 INCHES SECOND END IN |
| End Nominal Diameter | 2.756 INCHES FIRST END IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.880 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 |
|---|---|
| 12462248 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-01-451-8911 is a Gear,spur, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-451-8911 has 1 manufacturer part number on file: 12462248 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12462248: Bore Nominal Diameter: 2.230 INCHES FIRST END IN; Bore Nominal Diameter: 2.278 INCHES SECOND END IN; Teeth Quantity: 18; Second Step Nominal Diameter: 3.130 INCHES SECOND END IN. 28 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 3020-01-451-8911 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.