Simpson 1/2" x 6" Titen HD Mechanically Galvanized Washer-Head Screw AnchorModel No. THD50600WHMG Coating Material. Mechanically Galvanized Carbon Steel Size (in.) 1 2 x 6 Drill Bit Dia. (in.) 1 2 Recommended Fixture Hole Size (in.) 3 4 to 13 16 Product Includes. 1 2 in. socket adapter and (2) T drive bits The Titen HD with washer head is a high strength screw anchor for use in cracked and uncracked concrete, as well as masonry. The washer head design is commonly used where a minimal head profile is necessary. The model is