The Gear,helical, cataloged under National Stock Number 3020-00-678-1769, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-678-1769 |
| Primary Part Number | 8754351 |
| 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 | 1.999 INCHES BOTH ENDS IN |
| Helix Angle | 29.2821 DEGREES |
| Hub Nominal Diameter | 2.880 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.146 INCHES SECOND END IN |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.830 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Material Document and Classification | MIL-S-13048 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 3.095 INCHES IN |
| Nominal Distance From End to First Groove | 0.830 INCHES FIRST END IN |
| Pressure Angle | 30.0000 DEGREES |
| Material | STEEL COMP 8620H OVERALL |
| First Groove Nominal Diameter | 2.760 INCHES FIRST END IN |
| First Groove Nominal Width | 0.140 INCHES FIRST END IN |
| Face Nominal Width | 0.740 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 |
|---|---|
| 8754351 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2520006781769 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 8754351 | 5/9 Secondary reference Spalla Inc |
NSN 3020-00-678-1769 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 3020-00-678-1769 has 1 manufacturer part number on file: 8754351 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-124-4264. Verify interchangeability with system specifications before substitution.
Key specifications for 8754351: Bore Nominal Diameter: 1.999 INCHES BOTH ENDS IN; Helix Angle: 29.2821 DEGREES; Hub Nominal Diameter: 2.880 INCHES FIRST END IN; Nominal Distance Between Body Face and Recessed Hub End: 0.146 INCHES SECOND END IN. 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.