More about ASME B18.2.1
FULL THREADED STANDARD DIN 933
More about DIN 7990 for Hex Bolts
More about EN 24014 standard
More about ASME B18.2.3.1 standard
More about ISO 4014 standard
DIN 931 is for partial thread hex cap screw What is a DIN 931 bolt? 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.