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ASTM A194 2H heavy hex nut
ASTM A563 Heavy Hex Nuts
DIN6916 Washer
DIN125 Flat Washers
ASTM F436 flat washers
DIN127 Spring Washers
hex bolt manufacture
ASME B 18.2.1 hex head bolt
Hot dip galvanized bolt
black oxide hex bolt
zinc plated hex bolt
hex bolt certificate