The Gear,helical, cataloged under National Stock Number 3020-01-494-4274, 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 Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-494-4274 |
| Primary Part Number | 7108115-4 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.0500 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.500 INCHES BOTH ENDS IN |
| Teeth Quantity | 67 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Mounting Hole Type and Quantity | 2 PLAIN AXIALLY THROUGH FLANGE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.458 INCHES BETWEEN BODY AND FLANGE IN |
| Mounting Hole Nominal Diameter | 0.350 INCHES AXIALLY THROUGH FLANGE IN |
| Teeth Type | SPIRAL |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | DOD-F-24669/1 GR-9310 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 6.1900 INCHES MINIMUM AND 6.2100 INCHES MAXIMUM IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 32 BOTH ENDS |
| Nominal Outside Diameter | 9.0000 INCHES IN |
| Pressure Angle | 10.0000 DEGREES AND 25.0000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Bolt Hole Circle Nominal Diameter | 4.500 INCHES AXIALLY THROUGH FLANGE IN |
| Spline Pitch Diameter | 2.0000 INCHES NOMINAL BOTH ENDS IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.4000 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 |
|---|---|
| 7108115-4 | Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland (USA) |
| 752-7068477-4 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H832-1662-4 | 3/2 Design control — primary reference U.S. Government activity |
| 7108155-4 | 5/9 Secondary reference Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland |
| 7068477 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-494-4274 is a Gear,helical, manufactured by Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-494-4274 has 2 manufacturer part numbers on file: 7108115-4 (Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland), 752-7068477-4 (Naval Sea Systems Command).
Key specifications for 7108115-4: Bore Nominal Diameter: 2.0500 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.500 INCHES BOTH ENDS IN; Teeth Quantity: 67; Body Style: PLAIN, SOLID. 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.
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.