The Gear,spur, cataloged under National Stock Number 3020-01-644-3605, 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 12 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 | 3020-01-644-3605 |
| Primary Part Number | 12446479 |
| 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 | 1.8403 INCHES BETWEEN BODY AND FLANGE IN |
| Teeth Quantity | 34 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Bore Style | STRAIGHT SPLINE BETWEEN BODY AND FLANGE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.86 INCHES FIRST END IN |
| Style Designator | PROTUDING HUBS |
| Material Document and Classification | ASTM A304 ASSN STD ALL MATERIAL RESPONSES OR ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM A108 ASSN STD ALL MATERIAL RESPONSES OR AASTM A519 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Pitch Diameter | 8.870 INCHES MINIMUM AND 8.880 INCHES MAXIMUM IN |
| Nominal Outside Diameter | 9.250 INCHES IN |
| Pressure Angle | 30.0 DEGREES |
| Material | STEEL COMP 4320 OR STEEL COMP 4320H OR STEEL COMP 4620 OR STEEL COMP 4620H OR STEEL COMP 8620 OR STEEL COMP 8620H OVERALL |
| Face Nominal Width | 1.89 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 |
|---|---|
| 12446479 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-01-644-3605 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 3020-01-644-3605 has 1 manufacturer part number on file: 12446479 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12446479: Bore Nominal Diameter: 1.8403 INCHES BETWEEN BODY AND FLANGE IN; Teeth Quantity: 34; Body Style: WEBBED, WITH LIGHTENING HOLES; Bore Style: STRAIGHT SPLINE BETWEEN BODY AND FLANGE. 12 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.