The Gear,helical, cataloged under National Stock Number 3020-01-183-7288, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-183-7288 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.909 INCHES BOTH ENDS IN |
| Helix Angle | 30.0000 DEGREES |
| Teeth Quantity | 30 |
| Body Style | PLAIN, SOLID |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Teeth Type | DOUBLE HELIX, SOLID |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.8750 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Spline Quantity | 6 BOTH ENDS |
| Nominal Outside Diameter | 2.025 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.250 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 |
| Reference | Meaning |
|---|---|
| 494722-1 | 5/9 Secondary reference L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. |
| 494722 | D/9 Drawing number reference only L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. |
| 494722-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-01-183-7288 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-183-7288: Bore Nominal Diameter: 0.909 INCHES BOTH ENDS IN; Helix Angle: 30.0000 DEGREES; Teeth Quantity: 30; Body Style: PLAIN, SOLID. 16 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.