This Yukon Gear & Axle crush sleeve is specified for 2014+ GM 9.5" 12-bolt rear differentials and measures 0.640" long. Sold as a pinion preload spacer, it supplies the correct length to set pinion preload during differential assembly or rebuilds on compatible GM 9.5" 12-bolt rear axle housings. Yukon supplies small differential parts intended for reliable reassembly.
Yukon Gear 9.5in GM 12 Bolt Rear Crush Sleeve .640in