Profile: Plastronix is involved in the manufacture and export of plastic thread protectors, plastic flange protectors, end covers & flange covers. We also offer plugs end caps, plastic flange covers and plastic stud hole end covers. Our products are used in flanges, pipe flanges, wedges and bonnet body. EP 105 end cover is standard product with single push in rib. It covers the raised faces and to protect all types of serrations.