1.surface treatment: plain, zpl(white, bluish, white), black, Environmental galvanized (cr3+zinc),hot-dip galvanized,dacromet

2.grade: 4.6,4.8,6.8,8.8,10.9

3.material: carbon steel

4.size: M6-M20,1/4''-3/4''

5.head:hex,round or square

6.standard:DIN,ISO,BS, ANSI/ASME.

7.package: carton box, gunny bag plus pallet(plywood, common wooden , fumigation)

8.material: mild carbon steel(Q195,Q235,C1008,C1010,C1020,C1020,C1035,C1045)

         Middle carbon steel(35#, 45#)

9.processes: cold forging and hot forged