RS ROLLER CHAIN ATTACHMENTS U.S. Tsubaki RS single pitch roller chains may be adapted for conveying duties by the addition of attachments. The standard types of attachments include bent or straight type attachments on one or both sides, extended pin, and wide contour attachments. A wide variety of assembled chain and components are stocked for quick delivery service. RS attachment chains are available in carbon steel, nickel-plated, NEPTUNEĀ®, and stainless steel. All dimensions are nominal values and for reference only