1.Standard:ANSI,DIN,BS
2.Property class:4.8 ,5.8,6.8, 8.8,10.9,12.9
3.Size:M3-M48
4.Coating:Nature,ZP,blackening,HDG,Env
Manufacturer claims:
(1)Competitive price with high quality
(2)Various of Design
(3)Ensure delivery in time
(4)Nice solid packing