1.achieved ISO9001:2000 2.Standards:DIN,ANSI/ASME,BS, ... ,8.8,10.9,12.9 4.Surface:customers demand 1. Standards: DIN ,ANSI/ASME, BS, GB, JIS, Non-standard2. ... main products of the company include the following 7 types:1. High strength alloy steel double end stud- , fully-threaded ... and heavy hex nut applied on petrochemical industry, boiler and wind power generation. The diameter is from M20-140MM and the ...