Metric hex head screws/bolts, defined in the DIN 933 standard published by the German Institute for Standardization (DIN), are externally threaded fasteners with a hexagonal washer-faced head and a chamfered end to facilitate mating with an internally threaded component. Hex screws have a fully threaded shank and are manufactured to very tight tolerances. Metric hex head screws/bolts are manufactured from marine grade stainless steel as well as aluminum, brass nylon and steel, with diameters ranging from M2 to M52.
Similarly, in the ISO 4017 standard published by the International Standards Organization (ISO), the properties of hex head bolts with threads from M1,6 to M64 and including M64, which are product class A, are described (ISO 4017 Fasteners - Hexagon head screws - Product grades A and B). This product type is the same as those covered by the ISO 200 standard, except for head threading and nominal lengths up to (inclusive) 4014 mm as preferred lengths.
Another standard in this regard is the following standard published by the British Standards Institute (BSI): BS 3692 ISO Metric precision hex bolts, screws and nuts, specification.
The ISO 4017 standard belongs to a group of product standards developed by ISO on hex drive fasteners. This product group includes:
Hexagon head screws are also less likely to be stripped than their conventional counterparts. The head of a conventional screw can be stripped during insertion or removal. Hexagon head screws distribute the torque across all six sides, so they're less likely to peel.
Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, within the scope of DIN 933 standard, hex head screws / bolts for full thread, within the scope of ISO 4017 standard, fasteners , also provides testing services for hex head screws (product grades A and B) and ISO metric precision hex bolts, screws and nuts under the BS 3692 standard.
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