... ,Certificated to ISO9001:2008 2,Carbon steel,stainless steel,bras,copper 3,Finished plain,zinc,nickle,black 4,Short L/T ... Heading & RollingThe screw production lines finish the cold heading and thread rolling for small carbon steel or stainless steel screws. Production ... .Production range: 200T max. DIN 1478,Turnbuckles made from steel tubes,round steel bars