Caterpillar-style premium aftermarket tooth or wear-system pin. Part reference 133-0738. Size/application: Sidebar Protector Pin / with Head (992). Matching tooth-system size: sidebar protector system (tooth size not applicable). Matching retainer reference depends on the installed system generation and is not separately identified in this catalog. Secures the replaceable tooth, protector or ripper component to its matching adapter. Brand compatibility: Caterpillar and premium aftermarket systems built to the matching Caterpillar specification. This hardware fits only the specified system and matching dimensions.