As an economical alternative to chromoly, QA1 is the exclusive provider of carbon steel loader slot rod ends. QA1's EXM Carbon Steel Series male 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. Ball 52100 Bearing Steel. Heat Treated. Hard Chrome Plated. Precision Ground. Race Nylon/PTFE. Self-Lubricating. Self-Sealing. Body Carbon Steel. Protective Coated for Corrosion Resistance. Exclusive Features Metal to Metal Support for Heavy Shock Loads. Increased Cross-Sectional Thickness for Greater Tensile Strength.