eBay

1/2x28 Internal Threads - 3/4x16 External Threads Threaded Oil Filter Adapter
This adapter is threaded in 1-2x28 inside diameter (female threads) X 3-4x16 outside diameter (male threads) with a 2.5 inch outer diameter 'flange'
Made of T6 6061 Aircraft Grade Aluminum, 2.5 inch outer diameter
Increased outer thread length ensures secure attachment to oil filter
Car Styling

All threads are CNC cut for smooth easy installationMaterial: T6 6061 Aircraft Grade AluminumInternal Threads： 1/2x28 External Threads： 3/4x16Diameter: 63.5mm, height: 23mm, Hole external diameter: 18mmPackage Includes:1x Threaded Oil Filter Adapter