Heavy hex nuts, structural nuts, hex nuts, flange nuts, castle nuts, square nuts, special fasteners and other various metal parts. Ansiasme b18.2.2,b18.2.4.1m,a563, din2510,din934,uni5587, the material can be astmasme a194 2h,2hm,7,7m,grade 8, 10 & 12 etc.size range: from 12" to 4" in inch or from m12 to m100 in metric!
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