Features and Application: Threaded fasteners used to position an object or to fasten two or more objects together. Grub types allow fasteners to press into the work piece material without breaking, cracking or deforming the work piece. Phillips drive types have a cross-shaped slot and are used with Phillips drivers. Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings.