#2 square-drive bugle heads drive flush with work surface

All material is manufactured with rolled threads

Hi-Low thread pattern creates higher pullout tolerances

Pre-drilling recommended near board ends to prevent splitting

5/8-11 x 3 1/2 Hex Tap Bolt Silicon Bronze 5/8-11 Socket Cap Screws 18-8 Stainless Steel #2 square-drive bugle heads drive5 8 11 x 3 1 2 Hex Tap Bolt Silicon Bronze. Silicon Bronze Hex Tap Bolts are similar to low carbon steel in hardness but offer high resistance to corrosive environments such as sea water, gases, sewage and atmospheric conditions. Commonly used in naval construction and power plant applications.