DIN 961 Hex Head Cap Screws

DIN 961 Hex Head Cap Screws are fully threaded and have fine or extra fine external machine screw threads (the distance from thread to thread is less than for coarse threads). Having dimensions that are similar to ISO 8675, use with tapped holes and nuts. Class 8.8 and 10.9 steel are available; zinc plating provides corrosion protection while plain finish is unplated and can rust. The thread tolerance of Class 8.8 and 10.9 is 6g for plain finish and 6h for plated; right-hand threads are standard. Sometimes called hex head bolts and tap bolts, the length of the bolt is measured from under the head to the tip. DIN 961 Hex Head Cap Screws are similar to ISO 8675 and JIS B1180. For comparison, DIN 960 is partially threaded and DIN 933 is fully threaded but has coarse threads.

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