The Gear,helical, cataloged under National Stock Number 3020-00-293-4024, 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 25 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-293-4024 |
| Primary Part Number | 3230072 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Hatch & Kirk, Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 4.375 INCHES BOTH ENDS IN |
| Helix Angle | 25.81635 DEGREES |
| Hub Nominal Diameter | 6.750 INCHES FIRST END IN |
| Teeth Quantity | 69 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 4 PLAIN AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Type and Quantity | 4 THREADED AXIALLY THROUGH BODY SECOND END |
| Mounting Hole Nominal Diameter | 0.500 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 10.0 ROCKWELL C MINIMUM AND 20.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.062 INCHES IN |
| Material Document and Classification | MIL-S-890,CLASS B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.6250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Nominal Thread Size | 0.375 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Mounting Hole Thread Quantity Per Inch | 24 AXIALLY THROUGH BODY SECOND END |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 5.250 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Bolt Hole Circle Nominal Diameter | 5.250 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH BODY SECOND END |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 3230072 PRIMARY | Hatch & Kirk, Inc. (USA) |
| Reference | Meaning |
|---|---|
| SS198S41-0573PC63 | 3/2 Design control — primary reference U.S. Government activity |
| CL51S61-0875PC63 | 3/2 Design control — primary reference U.S. Government activity |
| 3230072 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| 81125S41-30198ALT1PC3 | 3/2 Design control — primary reference U.S. Government activity |
| SS198S41-0574PC63 | 3/2 Design control — primary reference U.S. Government activity |
| S6100-10070PC63 | 3/2 Design control — primary reference U.S. Government activity |
| 81125S41-21598ALT1PC3 | 3/2 Design control — primary reference U.S. Government activity |
| SS212S41-0574PC63 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-293-4024 is a Gear,helical, manufactured by Hatch & Kirk, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-293-4024 has 1 manufacturer part number on file: 3230072 (Hatch & Kirk, Inc.).
Key specifications for 3230072: Bore Nominal Diameter: 4.375 INCHES BOTH ENDS IN; Helix Angle: 25.81635 DEGREES; Hub Nominal Diameter: 6.750 INCHES FIRST END IN; Teeth Quantity: 69. 25 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.