Features:1)Size: a)Square head bolt:M10 to M48b)Square small head bolt: M5 to M48

2)Material:Mild steel,35C,45C,SUS304,SUS 316

3)Standard: DIN,ANSI,JIS,BS...

4)Surface treatment: Chemical black,Zinc Plated...

5)Packing :According to customer's request

we still can produce square head bolts with collar(DIN478) and square head bolts with collar and oval half dog point(DIN480)