标准号:IS 844 Pt.1-1979
发布日期:1980/2/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:Covers technical supply conditions for hand-operated screwdrivers for slotted head and grub screws, requirements in respect of material, hardness, workmanship and finish and methods of test. Specifices the dimensions for three types of screwdriver points and also gives guidance in respect of the correct application of screwdriver points for various sizes of screws.