We export products include various different specifications and types: HEAVY HEX NUTS, STRUCTURAL NUTS, HEX NUTS, FLANGE NUTS, CASTLE NUTS, SQUARE NUTS, SPECIAL FASTENERS AND OTHER VARIOUS METAL PARTS. ANSI/ASME B18.2.2,B18.2.4.1M,A563, DIN2510,DIN934,UNI5587, the material can be ASTM/ASME A194 2H,2HM,7,7M,GRADE 8, 10 & 12 ETC.Size Range: from 1/2" to 4" in inch or from M12 to M100 in metric!