DIN931 DIN933 Hex Head Bolt Nut

Screw Fastener is a kind of mechanical parts used for fastening connection and widely used.it is characterized by a wide variety of specifications,performance and use of different, and standardization,generalization is also very high,so the existing national standard of a class of Fasteners known as standard Fasteners.

Flange Bolts is a form of threaded Fastener with an external male thread.Serration with hot dip galvanized finish treatment.The Flange Bolts is an integral Bolt consisting of a hex head and a flange (the gasket under the hex and the hex fixed as one) and a

screw (the cylinder with external thread). It shall be matched with a Nut for fastening the parts connected with two through holes.

Material of Screw Bolt Nut: carbon steel,steel 45#. 

Size: M3-M52 or as customer request.

Finish treatment: hot dip galvanized ,micron 40-50.

Surface finishing:plain,Black Phosphated,White/Yellow/Black Zinc plated,HDG,Dacromen.

Standard of Screw Bolt Nut: DIN 931,DIN933,ANSI.

Usage of Hardware Fastener: matched with Nuts to tighten the parts connecting two through holes, so the Bolt connection is a detachable connection.