DIN 6921 Hex Flange Bolt 10.9 Steel plain

Material: steel.
Fully threaded, metric thread.
Uncoated (ST).
Strength class 10.9.
Hex flange head.

A hex flange bolt (also known as a flange bolt, nut head bolt, hex head bolt) is the most commonly used screw fastener in machinery and equipment installations. The head shape provides a good grip, and the tools used for installation allow the fastener to be tightened to the correct torque. The integral flange (acting as a built-in washer) under the bolt head speeds up installation. In everyday language, hex bolts are known by many names, such as bolt, screw, machine screw, nut head screw, threaded bolt, or threaded screw, to name a few of the most common.
Materials: uncoated steel (ST), zinc-plated (bright zinc, ZN, zinc), zinc flake (ZNF, Delta, Ruspert), stainless steel (A2), and acid-resistant steel (A4).