Hardware Fastener usually include Bolts,studs,screws,Nuts,gaskets,pins,etc.The Screw Bolt Nut production process of high strength threader fasteners is as follows:raw material restructuring,cold heading forming,thread processing(thread rolling or thread rolling),heat treatment,surface treatment,sorting and package.Above grade 10.9,wire rolling process after heat treatment is generally adopted.
Ordinary hex Socket Bolt refers to the 4.8 Grade,high strength refers to the 8.8 Grade above including 10.9 and 12.9 Grade.
Flange Hex bolt with Serration with hot dip galvanized finish treatment .The flange Bolt 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 Hex Bolts: SS 201, SS 303,SS 304,SS 316.
Size: M 3-M 56
Length: 30 mm-500 mm .
Surface treatment:Nature color,Black oxide,Phosphate,Zinc plated,micron 40-50.
Manufacturing process:Wire drawing,Cold heading,Insert tapping,Heat treatment,Surface plating,Inspection,Packing.
Standard : DIN 6921,DIN 933,DIN 931,DIN 934
Delivery time:Regular products is about 7-10 days,custom product will according to special requirement.
Usage : matched with Nuts to tighten the parts connecting two through holes, so the Flange Bolts connection is
a detachable connection.
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