Bolt: hexagon head

ISO 4016

ISO 4016 - Hexagon head bolts - Product grade C

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Hexagon head bolts with a plain shank, metric coarse pitch thread, product grade C instead of the grades A and B of ISO 4014, so with wider tolerances. The bolt is turned by a spanner on a hexagon head and keeps a plain shank under it, so the thread stops short of the head and the joint is clamped on unthreaded metal. Grade C is the coarse tolerance grade of the hexagon head bolt: the head keeps the nominal width across flats s and head height k of ISO 4014, but its tolerances are wider and its minimum width across corners e and bearing face dw are smaller than in grade A, the plain shank may be larger or smaller than the thread diameter, the thread has tolerance 8g, and the bolts are made in property classes 4.6 and 4.8 up to M39. A size is the pair d x l: the thread diameter fixes the head, while the length decides the thread length b - 2d + 6 mm up to 125 mm, 2d + 12 mm up to 200 mm and 2d + 25 mm above it. Covers threads M5 to M64 with nominal lengths 25 to 500 mm. Its German predecessor DIN 601 was replaced by DIN EN ISO 4016; the fully threaded counterpart is ISO 4018 and the product grade A and B version is ISO 4014.