EX Series carbon steel rod end. Injection molded with female mounting with left hand 5/16" bore and 5/16-24. As an economical alternative to chromoly, QA1 is the exclusive provider of carbon steel loader slot rod ends. QA1's EXF Carbon Steel Series female rod ends have increased cross-sectional thickness and are completely self-sealing and self-lubricating. The Nylon/PTFE injection molded race won't pound out like other styles and keeps dirt and debris out for excellent performance.