Screw with enlarged cylindrical head and straight slot DIN 921

   DIN 921 is a clamping type fastener. It is made in the form of a rod with a metric thread and an enlarged head. The use of this screw results in a quick-release connection characterized by a significant clamping force and a small protrusion above the surface.

Strength class DIN 921

     DIN 921 screws are made of steel with a strength class of 5.8.

DIN 921 fastening group

     DIN 921 screws are most often made of stainless steel and belong to the stainless steel fastener group.

Materials for the manufacture of DIN 921 screws

     DIN 921 screws are made of the following materials: 

• Steel with a strength class of 5.8, which can optionally be coated with zinc. Zinc (Plated) protects against corrosion if the fastener is to be used in aggressive environments.
• Stainless steel grade A1. Allows the use of fasteners at significant temperature changes and in aggressive and humid environments.

Application range of DIN 921 screws

     DIN 921 screws are widely used in instrumentation and other industrial sectors. They are designed for quick-release fastening of parts made of thin-walled materials: the increased diameter of the head reduces the pressure on the material and prevents its deformation. DIN 921 screws are widely used in instrumentation, mechanical engineering, automotive, and other industrial applications.