Suspension Rod End Bearing. Rod End (Pc) 2-Pc Alloy Ht M-L 1/2-5/8. PC Series two piece, black oxide coated rod end. Male mounting with a 1/2″ bore and 5/8-18 left hand threads.. For a variety of options in a two-piece design, QA1 offers its PCM Chromoly Steel Series rod ends. These black oxide coated rod ends offer superior load ratings over carbon steel two-piece rod ends and are available as metal-to-metal or PTFE lined. The ball is made from 52100 bearing steel that has been heat treated, hard chrome plated and precision ground. The body is chromoly steel that has beed heat treated and black oxide coated.