This standard specifies the characteristics of machine screws with hexalobular holes of nominal size M2 to M10, part class A. If there are requirements other than dimensions and product specifications stipulated in this standard, those requirements can be expressed in accordance with, for example, JIS B 0205-2, JIS B 0209-2, JIS B 1009, JIS B 1021, JIS B 1051, and It is best to select from JIS B 1054-1.