Are 316 Stainless Steel Deck Screws Required for Coastal Construction? 316 stainless steel is strongly recommended for coastal, marine, waterfront, and salt-air environments. Some project specifications may require it. By Marsh Fasteners|2026-08-06T13:08:54-04:00August 6, 2026|316 Stainless Steel QD Type 17 Deck Screws|