The Gear,helical, cataloged under National Stock Number 3020-00-947-2138, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 21 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-947-2138 |
| Primary Part Number | 65A27C77 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.1874 INCHES BOTH ENDS IN |
| Helix Angle | 6.0000 DEGREES |
| Teeth Quantity | 30 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 PLAIN TRANSVERSELY THROUGH FACE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.055 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.109 INCHES TRANSVERSELY THROUGH FACE IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.6284 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 0.6700 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Bolt Hole Circle Nominal Diameter | 0.375 INCHES TRANSVERSELY THROUGH FACE IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.140 INCHES SECOND END IN |
| Face Nominal Width | 0.185 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 |
NSN 3020-00-947-2138 is a Gear,helical, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-947-2138 has 2 manufacturer part numbers on file: 65A27C77 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 65A27C77 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 65A27C77: Bore Nominal Diameter: 0.1874 INCHES BOTH ENDS IN; Helix Angle: 6.0000 DEGREES; Teeth Quantity: 30; Body Style: PLAIN, SOLID. 21 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.