The Gear,spur, cataloged under National Stock Number 3020-00-679-4435, 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 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-679-4435 |
| Primary Part Number | 9099808 |
| 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 | 1.187 INCHES BOTH ENDS IN |
| Teeth Quantity | 39 |
| Body Style | WEBBED, SOLID |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.530 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.530 INCHES FIRST END IN |
| First Step Nominal Length | 0.062 INCHES FIRST END IN |
| First Step Nominal Length | 0.062 INCHES SECOND END IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM TEETH |
| Nominal Overall Length | 2.060 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.3333 INCHES NOMINAL IN |
| Tooth Form | STUB |
| First Step Nominal Diameter | 2.310 INCHES FIRST END IN |
| First Step Nominal Diameter | 2.310 INCHES SECOND END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 10 BOTH ENDS |
| End Nominal Length | 0.469 INCHES FIRST END IN |
| End Nominal Length | 0.469 INCHES SECOND END IN |
| Nominal Outside Diameter | 4.531 INCHES IN |
| End Nominal Diameter | 1.809 INCHES FIRST END IN |
| End Nominal Diameter | 1.809 INCHES SECOND END IN |
| Pressure Angle | 22.2062 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.000 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 |
|---|---|
| 9099808 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 9099808 | 5/9 Secondary reference Spalla Inc |
NSN 3020-00-679-4435 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 3020-00-679-4435 has 1 manufacturer part number on file: 9099808 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 9099808: Bore Nominal Diameter: 1.187 INCHES BOTH ENDS IN; Teeth Quantity: 39; Body Style: WEBBED, SOLID; Bore Style: STRAIGHT SPLINE BOTH ENDS. 27 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.