Caterpillar-style premium aftermarket tooth retainer or locking component. Part reference 8E8409. Size/application: J400 Retainer. Matching tooth-system size: J400. Matching pin reference: 7T3408. 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.