Hexagon Bolts are created to DIN 931, and are a partially threaded fastener with a hexagon-shaped head that is usually fixed with a spanner or socket tool. Hosting a machine
thread, these bolts are suitable for use with either a nut or within a pre-tapped hole.
What is the difference between DIN 931 and 933?
As we already know, DIN 933 is a full thread hex head cap screw with coarse thread pitch, whereas DIN 931 is a partial thread hex head cap screw with coarse thread pitch.