The Gear,helical, cataloged under National Stock Number 3020-00-274-6613, 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 Cummins Inc.. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3020-00-274-6613 |
| Primary Part Number | 9171-1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Cummins Inc. |
| Status | CANCELLED |
| Keyway Nominal Width | 0.187 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.8755 INCHES BOTH ENDS IN |
| Helix Angle | 22.6195 DEGREES |
| Hub Nominal Diameter | 1.375 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.375 INCHES FIRST END IN |
| Teeth Quantity | 23 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.438 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 1.313 INCHES IN |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.1146 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.3625 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.5482 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340H OVERALL |
| Face Nominal Width | 0.875 INCHES IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7033982 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 9171-1 | La Gary Co (USA) |
| 9171-1 PRIMARY | Cummins Inc. (USA) |
| Reference | Meaning |
|---|---|
| 319G1 | 5/9 Secondary reference Diamond Reo Truck Co |
| H9171-1 | 5/9 Secondary reference Cummins Inc. |
| 3020002746613 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 1B7388 | 5/2 Secondary reference U.S. Government activity |
| 3020002746613 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 403112 | 5/9 Secondary reference White Motor Corp |
NSN 3020-00-274-6613 is a Gear,helical, manufactured by Cummins Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: cancelled.
NSN 3020-00-274-6613 has 3 manufacturer part numbers on file: 7033982 (U S Army Tank Automotive Command Amsta-Im-Mm), 9171-1 (La Gary Co), 9171-1 (Cummins Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-183-6831, 5985-01-251-8088, 5340-01-629-5878. Verify interchangeability with system specifications before substitution.
Key specifications for 9171-1: Keyway Nominal Width: 0.187 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.8755 INCHES BOTH ENDS IN; Helix Angle: 22.6195 DEGREES; Hub Nominal Diameter: 1.375 INCHES SECOND END IN. 22 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 3020-00-274-6613 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.