Self-Tapping Screw Countersunk Head (Stainless Steel). Head: Countersunk Pozi Compatible Drive. Finish: Stainless Steel. Countersunk Head Will Fit Flush Into Pre-Countersunk Holes Or Will Countersink Into Soft Wood Or Timber. Stainless Steel Offers Solutions For Fastening Marine Coastal And Sanitary Type Applications.PTDFORDIRSTCSK11210SS