Detailed Product Description Finish: plain, black H.D.C. zinc (blue, yellow, white)Thread: full thread and non-full threadPhysical performance:a) class4.8,made from low carbon steel,C1008 .Q195 etcb) class8.8:made from high carbon steel such as C1035,C1045 etc, and with hardened treatmentPacking:a) in small box:2-5kgs/box,2-10boxes/carton,36-48cartons/palletb) in bulk packing:25kgs/carton,36- ...