Architectural Bolt Material Brass Barrel Head Style Truss Screw Head Style Flat Thread Size 5/16 In.-18 Barrel Length 2 1/16 in Barrel Diameter 1/2 in Barrel Thread Depth 1 1/4 in Barrel Drive Type No Drive Screw Drive Style Phillips Finish Plain Barrel Head Diameter 0.75 in Barrel Head Height 3/16 in Dimensional Standards AMPG 2000 SB.01 Grip Size 2 1/4 in Includes 82 Degree Screw Made in North America Yes Pack Size Small