Johnson Cover Plate Screw
Johnson Raw Water Cover Plate Screw
The Johnson Raw Water Cover Plate Screw fits almost all Indmar marine engines (Malibu, Supra, Moomba, etc.) and almost every MasterCraft produced from 1987 until the change to Ilmor engines in 2011.
5/16 Brass Hex Head
Make sure not to over tighten these screws.