Made to Japanese Industrial Standards, these Class 8.8 steel screws are good for fastening most machinery and equipment. Their head is about 10% smaller than those made to ISO standards, so they fit into tighter spaces than other metric screws. To prevent corrosion in wet environments, these screws are plated with either clear zinc or zinc yellow chromate. Length is measured from under the head.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch. Fine threads are closely spaced to prevent loosening from vibration.