5/8

Binding Post, Finish Plain, Material 316 Stainless Steel, Barrel Head Style Low Profile, Barrel Drive Type Internal Hex, Thread Size 5/8 In.-11, Barrel Length 1 1/2 in, Barrel Diameter 7/8 in, Barrel Thread Depth 3/4 in, Barrel Drive Size 1/2 in, Barrel Head Diameter 1 1/2 in, Barrel Head Height 1/8 in, Dimensional Standards AMPG 2000 SB.09, Made in North America Yes, Material Quality Standards ASTM A276, Pack Size Small