1,OEM 2,Raw material: 40Cr. 35K 45# 3,certificate: ISO9001-2008 4, ... treatment: Nuture, black, pot galvanizing, cold galvanizing, oil, parkerising etc.2. Grade: 5.6, 8.8, 10.6 and12.93. Dia ... : T B, UIC , AREA, etc. standard components:GB,DIN,ASTM.BS,etc6. Package: according to customer's requirement.7 good in ...