Seachoice Phillips Oval Head Tapping Screws - #8 x 5/8" - 00789. Clean, Secure Fastening for Marine and General Use. The Seachoice Phillips Oval Head Tapping Screws, #8 x 5/8" - 00789 are built for quick and dependable fastening in wood, fiberglass, and plastic-without the need for pre-threaded holes. The oval head offers a slightly raised, smooth finish ideal for applications where appearance matters just as much as holding strength.. These corrosion-resistant fasteners are designed with a Phil