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Wehrli billet ORB fill plug in clear anodized finish replaces the fill cap for WCFab rear differential covers, including the Duramax/Cummins AAM 11.5" cover and 2020–2024 GM 2500/3500HD and 2019–2022 Ram 2500/3500 WCFab covers. CNC machined billet plug uses a #16 (1") ORB thread with an O-ring seal, 3/4" hex head socket drive, and is made in the USA for direct replacement.
Wehrli Billet ORB Fill Plug for WCFab Rear Differential Covers - Clear Anodized
