This standard specifies the shape and dimensions of pallets with nominal dimensions from 320 mm to 2 000 mm used for mounting workpieces on machine tools and transporting workpieces between machine tools.
JIS B 6337:1998 history
1998JIS B 6337:1998 Workholding pallets for machine tools -- Dimensions
1993JIS B 6337:1993 Workholding pallets for machine tools -- Dimensions