Structure for standardizing parts of an endless track

A structure for standardizing at least one kind of part of an endless track so that parts can be used for the same size of construction vehicles of a plurality of construction vehicle makers, wherein (a) when the part is a link belt, each of a configuration and a dimension of each link, the pin and the bushing is unified over the same size of construction vehicles of a plurality of construction vehicle makers, and (b) when the part is a shoe including four coupling holes, each of a position, a configuration and a size of the four coupling holes is unified over the same size of construction vehicles of the plurality of construction vehicle makers.