标准号:IS 1821-1987
发布日期:1987/9/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This International Standard specifies clearance hole diameters for general purpose applications. These values result from bearing area calculations in connection with ISO bolt and nut product standards.NOTE — Clearance holes for special applications should be selected on the basis of design requirements.