The Gear,helical, cataloged under National Stock Number 3020-00-528-7137, 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 Hatch & Kirk, Inc.. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-528-7137 |
| Primary Part Number | 3265937 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Hatch & Kirk, Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.7275 INCHES BOTH ENDS IN |
| Helix Angle | 27.3217 DEGREES |
| Hub Nominal Diameter | 2.938 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.996 INCHES SECOND END IN |
| Teeth Quantity | 30 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.6880 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 2.0620 INCHES FIRST END IN |
| First Step Nominal Length | 0.6880 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | SAE 430B ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Tooth Form | STUB |
| First Step Nominal Diameter | 2.9960 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 6 BOTH ENDS |
| End Nominal Length | 1.3750 INCHES FIRST END IN |
| Nominal Outside Diameter | 6.2840 INCHES IN |
| End Nominal Diameter | 2.9380 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 2.000 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 |
|---|---|
| 3265937 PRIMARY | Hatch & Kirk, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3265937 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
NSN 3020-00-528-7137 is a Gear,helical, manufactured by Hatch & Kirk, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-528-7137 has 1 manufacturer part number on file: 3265937 (Hatch & Kirk, Inc.).
Key specifications for 3265937: Bore Nominal Diameter: 1.7275 INCHES BOTH ENDS IN; Helix Angle: 27.3217 DEGREES; Hub Nominal Diameter: 2.938 INCHES FIRST END IN; Hub Nominal Diameter: 2.996 INCHES SECOND END IN. 26 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.