... 0.0001mm ECO-material stainless steel piston pin bushing with screw thread Specifications:1) Suitable for various automotive, electronic, telecommunications ... hardening, carbonadoing, others optional can be as requirements6)Material: iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr, ... Steel products, Pins made of Iron, Copper and Aluminum, and so on, with an output of over 1 million ...