The Gear,spur, cataloged under National Stock Number 3020-00-798-4359, 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 25 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 | 3020-00-798-4359 |
| Primary Part Number | 7984359 |
| 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 | 1.562 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.250 INCHES SECOND END IN |
| Teeth Quantity | 42 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 2.256 INCHES SECOND END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.754 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.934 INCHES FIRST END IN |
| First Step Nominal Length | 0.156 INCHES FIRST END IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM TEETH |
| Nominal Overall Length | 2.000 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | 66,AISI/SAE 1042 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 2.250 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.778 INCHES FIRST END IN |
| Nominal Outside Diameter | 3.630 INCHES IN |
| End Nominal Diameter | 1.968 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1042 OVERALL |
| Counterbore Nominal Depth | 0.656 INCHES SECOND END IN |
| Face Nominal Width | 0.312 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 |
|---|---|
| 7984359 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-00-798-4359 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 3020-00-798-4359 has 1 manufacturer part number on file: 7984359 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7984359: Bore Nominal Diameter: 1.562 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.250 INCHES SECOND END IN; Teeth Quantity: 42; Body Style: PLAIN, SOLID. 25 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.