Roller Chain, Chain Construction Riveted Pin, Material Carbon Steel, Chain Overall Width 45/64 in, Chain Number 40, Roller Diameter 5/16 in, Pitch 1/2 in, Link Type Connecting, Number of Strands 1, Application Mechanical Drives, Pin Outside Diameter 0.156 in, Plate Height 0.654 in, 0.701 in, Plate Thickness 0.059 in, Standards ANSI B29.1, DIN8196, JIS1801