Caterpillar-style premium aftermarket tooth or wear-system pin. Part reference 6Y3394. Size/application: Ripper Pin D8/D9. Matching tooth-system size: ripper/scarifier system (J-size not applicable). Matching retainer reference: 8E4743. 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.