-11, Screw Minimum Thread Length 1 in, Barrel Head Style Flat, Barrel Drive Size 1/2 in, Dimensional Standards AMPG 2000 SB.07, Made in North America Yes, Material Quality Standards ASTM A582, Pack Size Small, Resistance Properties Corrosion-Resistant.Architectural Sex Bolt, Finish Plain, Material 18-8 Stainless Steel, Screw Head Style Flat, Screw Drive Style Socket, Thread Size 5/8 In.