M4-0.7 Metric Din 917 Hex Cap Nut Flat Top A2 Stainless Steel (Pack Qty 2,000) BC-M4D917A2

A one-piece hex nut with a low-profile dome-shaped top and a threaded hole at the opposite end Cap nuts serve two main purposes: (1) as decorative pieces, and (2) as covers for projecting threads. The low-type cap nut is chosen when there is limited clearance space above the nut