Simpson Strong-Tie THDB62400H6SS - 5/8-Inch x 4-Inch Hex Washer Head, Type 316 Stainless Steel Titen HD Heavy Duty Screw Anchor for Concrete, Easy Installation (Pack of 10)
Qualified for static and seismic loading conditions
Thread design undercuts to efficiently transfer the load to the base material
No special drill bit required; designed to install using standard-sized ANSI tolerance drill bits
Hex-washer head requires no separate washer and provides a clean installed appearance
The THDSS has an innovative carbon-steel thread that effectively cuts the concrete while significantly limiting the amount of carbon steel in the anchor; less carbon steel, less expansion