The Gear,spur, cataloged under National Stock Number 3020-00-905-7550, 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 21 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 | 3020-00-905-7550 |
| Primary Part Number | 8356347 |
| 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 | 8.549 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 9.480 INCHES FIRST END IN |
| Teeth Quantity | 51 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 8.750 INCHES FIRST END IN |
| Bore Style | INVOLUTE SPLINE SECOND END |
| Bore Style | W/COUNTERBORE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.420 INCHES FIRST END IN |
| Hardness Rating | 49.0 ROCKWELL C NOMINAL OVERALL |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 10.2000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 70 BOTH ENDS |
| Nominal Outside Diameter | 10.490 INCHES IN |
| Pressure Angle | 10.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Counterbore Nominal Depth | 0.660 INCHES FIRST END IN |
| Spline Pitch Diameter | 8.7500 INCHES NOMINAL SECOND END IN |
| Face Nominal Width | 1.440 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 |
|---|---|
| 8356347 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-00-905-7550 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 3020-00-905-7550 has 1 manufacturer part number on file: 8356347 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8356347: Bore Nominal Diameter: 8.549 INCHES BOTH ENDS IN; Hub Nominal Diameter: 9.480 INCHES FIRST END IN; Teeth Quantity: 51; Body Style: PLAIN, SOLID. 21 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.