Fabco 758C-99007 or 758C99007 magnetic plug, 3/4 NPT. The magnet on the oil-wetted end attracts iron and steel wear particles as the lubricant moves past, holding them out of circulation between services. It is an added debris-catching point near the plug, not a stand-in for regular fluid service, and it does not collect non-magnetic metals. A light film of fine metal dust on the magnet is normal in a gear case; a plug that keeps coming out heavily loaded is worth investigating. A genuine Fabco part from Pro Gear and Transmission.
Features
Genuine Fabco magnetic plug, part number 758C-99007
3/4 NPT tapered pipe thread
Magnet holds iron and steel wear particles out of circulation
A fine film of metal dust on the magnet is normal; heavy buildup is worth a closer look
