materials
Carbon steel,Stainless steel
grade
grade 2,4,5,6,8,10,12
finish
Plain, black, zinc plated, H.D.G and so on
Diameter
1/4",5/16",3/8",7/16",1/2",5/8",3/4",7/8",1",etc
Thread direction
left hand or right, according to customers requirements
Technique
Cold heading and hot heading