The Gear,helical, cataloged under National Stock Number 3020-00-522-1175, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-522-1175 |
| Primary Part Number | 10876134 |
| 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 |
| Bore Nominal Diameter | 1.400 INCHES FIRST END IN |
| Helix Angle | 20.0000 DEGREES |
| Hub Nominal Diameter | 2.125 INCHES FIRST END IN |
| Teeth Quantity | 13 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.006 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.881 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | ASTMA322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.7670 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 6 BOTH ENDS |
| Nominal Outside Diameter | 3.082 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8620 OVERALL |
| Face Nominal Width | 0.812 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 |
|---|---|
| 10876134 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3020005221175 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3005281 | 5/1 Secondary reference Garwood/feller Inc Garwood Winch Div |
NSN 3020-00-522-1175 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 3020-00-522-1175 has 1 manufacturer part number on file: 10876134 (U S Army Tank Automotive Command Amsta-Im-Mm).
3 possible matches (shared part number, not a government interchangeability claim): 6160-01-378-0517, 5999-01-442-6689, 4820-01-713-6819. Verify interchangeability with system specifications before substitution.
Key specifications for 10876134: Bore Nominal Diameter: 1.400 INCHES FIRST END IN; Helix Angle: 20.0000 DEGREES; Hub Nominal Diameter: 2.125 INCHES FIRST END IN; Teeth Quantity: 13. 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.