The Gear,helical, cataloged under National Stock Number 3020-00-221-0099, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-221-0099 |
| Primary Part Number | 64A98C716-1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Keyway Nominal Width | 0.377 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.541 INCHES BOTH ENDS IN |
| Helix Angle | 20.0000 DEGREES |
| Teeth Quantity | 38 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4615 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.0439 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 4.2390 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.938 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4615 OVERALL |
| Face Nominal Width | 1.000 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 |
|---|---|
| 64A98C716-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 64A98C716-1 | 3/9 Design control — primary reference Gse Production and Support Llc Dba Gse Spares |
| 64A98C716-1 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-221-0099 is a Gear,helical, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-221-0099 has 1 manufacturer part number on file: 64A98C716-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 64A98C716-1: Keyway Nominal Width: 0.377 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.541 INCHES BOTH ENDS IN; Helix Angle: 20.0000 DEGREES; Teeth Quantity: 38. 18 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.