The Gear,helical, cataloged under National Stock Number 3020-00-253-8511, 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 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-253-8511 |
| Primary Part Number | 299138PC2 |
| 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 | 1.5805 INCHES BOTH ENDS IN |
| Helix Angle | 45.0000 DEGREES |
| Teeth Quantity | 26 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0640 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Spline Quantity | 6 BOTH ENDS |
| Nominal Outside Diameter | 3.226 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 1340 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 |
|---|---|
| 299138PC2 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-253-8511 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 3020-00-253-8511 has 1 manufacturer part number on file: 299138PC2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 299138PC2: Bore Nominal Diameter: 1.5805 INCHES BOTH ENDS IN; Helix Angle: 45.0000 DEGREES; Teeth Quantity: 26; Body Style: PLAIN, SOLID. 17 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.