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M3.5/BN1684 is an internally threaded, heat-stabilized clasp nut manufactured by Bossard, a global supplier of fasteners, tools, components, and inventory solutions. It is made of zinc-plated steel and features a metric thread size of M3.5 and a coarse thread pitch of 0.35 mm. The fastener has a nominal length of 6 mm, a width of 8 mm, and a diameter of 4.4 mm. The Bossard clasp nut is designed to form a secure connection between two parts or components, such as the shaft and hub of a rotating machine. It is widely used in the automotive and electronics industries, as well as many others.