The Gear,helical, cataloged under National Stock Number 3020-00-752-1029, 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 23 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-752-1029 |
| Primary Part Number | 7521029 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Keyway Nominal Width | 0.312 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.250 INCHES BOTH ENDS IN |
| Helix Angle | 28.2533 DEGREES |
| Hub Nominal Diameter | 3.000 INCHES SECOND END IN |
| Hub Nominal Diameter | 3.000 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.531 INCHES SECOND END IN |
| Teeth Quantity | 42 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.063 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 59.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.9000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 6.083 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.312 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8620H OVERALL |
| Face Nominal Width | 0.968 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 |
|---|---|
| 7521029 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 914107 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 2359T2 | 5/9 Secondary reference Diamond Reo Truck Co |
| 30-196-10 | 5/9 Secondary reference U.S. Government activity |
| 2359T2 | 5/9 Secondary reference Spalla Inc |
| TG196-10 | 5/9 Secondary reference U.S. Government activity |
| 30-196-10 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-752-1029 is a Gear,helical, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-752-1029 has 1 manufacturer part number on file: 7521029 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7521029: Keyway Nominal Width: 0.312 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.250 INCHES BOTH ENDS IN; Helix Angle: 28.2533 DEGREES; Hub Nominal Diameter: 3.000 INCHES SECOND END IN. 23 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.