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What does din in the bolt mean

German Institute for Standardization. German name: Deutsches Institut für Normung e.V. German abbreviation: DIN. Germany's largest and widely representative non-profit standardization non-governmental organization. Founded in 1917. Headquartered in the capital Berlin. To develop, publish, and promote the application of German standards and other standardization work products in the interest of the public, through the joint cooperation of interested parties, in order to contribute to rationalization, quality assurance, safety and mutual understanding.
Weld screws with metric head
DIN 34817
Squate head bolts with collar
DIN 478
Mushroom head square neck bolts
DIN 603
Flat countersunk nib bolts
DIN 604
Flat countersunk square neck bolts with long square
DIN 605
Cup head nib bolts
DIN 607
Flat countersunk square neck bolts with short square
DIN 608
Steel hexalobular head bolts with large flange
DIN 34801
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