Fabco 758-0393 or 7580393 is a #4 ORB plug, supplied as a unit pack of 1. ORB stands for O-ring boss, and a plug of this kind closes off an unused port. It seals with an O-ring that is pressed into the angled seat of the port as the plug is tightened, so the seal does not depend on the threads alone. This is a genuine OEM Fabco part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Genuine OEM Fabco plug, #4 ORB (O-ring boss)
Unit pack of 1
Closes off an unused port
Seals with an O-ring pressed into the port seat, not by the threads alone
