The Gear,spur, cataloged under National Stock Number 3020-00-844-0135, 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 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-844-0135 |
| Primary Part Number | 8351746 |
| 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 | 2.940 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.937 INCHES SECOND END IN |
| Teeth Quantity | 68 |
| Body Style | WEBBED, OFFSET, WITH LIGHTENING HOLES |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Mounting Hole Type and Quantity | 3 PLAIN TRANSVERSELY THROUGH FACE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.360 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 2.560 INCHES FIRST END IN |
| First Step Nominal Length | 1.939 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.750 INCHES TRANSVERSELY THROUGH FACE IN |
| Hardness Rating | 60.0 ROCKWELL C NOMINAL TEETH |
| Hardness Rating | 50.0 ROCKWELL C NOMINAL HUB |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 11.3333 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 4.134 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 22 BOTH ENDS |
| End Nominal Length | 0.980 INCHES FIRST END IN |
| Nominal Outside Diameter | 11.657 INCHES IN |
| Surface Treatment | PHOSPHATE TEETH |
| End Nominal Diameter | 3.878 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8620 OVERALL |
| Spline Pitch Diameter | 2.7500 INCHES NOMINAL BOTH ENDS IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.900 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 |
|---|---|
| 8351746 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3020008440135 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 3020-00-844-0135 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 3020-00-844-0135 has 1 manufacturer part number on file: 8351746 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8351746: Bore Nominal Diameter: 2.940 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.937 INCHES SECOND END IN; Teeth Quantity: 68; Body Style: WEBBED, OFFSET, WITH LIGHTENING HOLES. 29 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 3020-00-844-0135 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.