Hyundai-style premium aftermarket tooth retainer or locking component. Part reference 66NB-31350. Size/application: Hyundai TH500RC Retainer. Matching tooth-system size: the matching tooth or wear system shown by the part reference. Matching pin reference: 66NB-31340. Secures the replaceable tooth, protector or ripper component to its matching adapter. Brand compatibility: Hyundai and premium aftermarket systems built to the matching Hyundai specification. This hardware fits only the specified system and matching dimensions.