Main Products
There are three series of main products. They are nut series (GB/T6170,GB/T6177.1,GB/T13680,13681,DIN934,DIN555,DIN928,929,DIN6923,DIN985,ASME/ANSI B18.2.2,IFI-145), socket head cap screw (GB/T70.1,70.2,70.3,DIN912,DIN7991,ASME B18.3) and hex bolt series (GB/T5782,5783,GB/T5787,5789,DIN933,DIN6921,ASME/ANSI B18.2.1,IFI-111). The products are made in plain carbon steel, medium carbon steel, and alloy steel materials.