This 316 stainless-steel screw is designed for use outdoors and in corrosive environments.
Many people don’t realize that Simpson’s Titen HD concrete anchors, despite their zinc coating, are not approved for outdoor connections. The problem is the carbon steel they’re made from expands when it rusts, cracking the concrete where it’s embedded and ruining the anchor’s lateral and uplift resistance. However, the company recently introduced a 316 stainless-steel version of their Titen HD screws (THDSS) for use outdoors and in corrosive environments. The stainless-steel Titen HD screws are available in 3/8 in. dia. in lengths from 3 in. to 6 in. and 1/2 in. dia. in lengths from 3 in. to 8 in. A 20-count box of 1/2 in. dia. by 5 in. sells on the web for $138.