Aluminum alloy, a357-t61, ; primer, epoxy polyamide , coating, linear polyurethane, dark gray on shank; 0.127 in. Min and 0.133 in. Max diameter 2 holes; 0.217 in. Min and 0.223 in. Max hole diameter 2 places; 0.385 in. Min and 0.392 in. Max hole dia, one place; 0.249 in. Min and 0.255 in. Max hole diameter 2 places; right hand side