BOLT Motorcycle Hardware (2006-CH) Chain Adjuster Nut Assembly For stock applications (this item does not work with Bolt custom billet chain adjuster block fasteners) Class 8 zinc plated steel M8 x 50mm hex head bolts and M8 flange jamb nuts with a 12mm A/F (hex) Fits all stock applications that use an 8mm bolt (most off-road and street models) Hardware meets or exceeds OEM specifications