The Gear,worm, cataloged under National Stock Number 3020-01-498-2540, 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 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 | 3020-01-498-2540 |
| Primary Part Number | 3637AS818-1 |
| Item Name | Gear,worm |
| 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 |
| Thread Form Direction | RIGHT-HAND |
| Helix Angle | 0.3142 DEGREES |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Mounting Hole Type and Quantity | 1 PLAIN TRANSVERSELY THROUGH FACE |
| Throat Nominal Radius | 0.625 INCHES IN |
| Face Type | STRAIGHT |
| Mounting Hole Nominal Diameter | 0.218 INCHES TRANSVERSELY THROUGH FACE IN |
| Criticality Code Justification | AGAV |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.2500 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Thread Form Quantity | 5 |
| Nominal Outside Diameter | 1.450 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Attachment Method | MOUNTING HOLE |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 3637AS818-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 3020-01-498-2540 is a Gear,worm, 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 3020-01-498-2540 has 1 manufacturer part number on file: 3637AS818-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 3637AS818-1: Thread Form Direction: RIGHT-HAND; Helix Angle: 0.3142 DEGREES; Hub Nominal Diameter: 0.500 INCHES FIRST END IN; Mounting Hole Type and Quantity: 1 PLAIN TRANSVERSELY THROUGH FACE. 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.