DT Fastener provides quality JIS B 1186 structural nuts at great market prices. JIS, Japanese Industrial Standards, is the most important and authoritative standard among Japanese national standards. Developed by the Japan Industrial Standards Survey (JISC). Classification and refinement are divided into civil construction, general machinery, electronic instruments, and electrical machinery, automobiles, railways, ships, steel, non-ferrous metals, chemicals, fibers, mining, pulp and paper, management systems, ceramics, daily necessities, medical safety Appliances, aviation, information technology, and other 19 items.