Bobs Machine Transom to Jack Plate Bolt Kit The Bobs Machine Transom to Jack Plate Bolt Kit is used for jack plate installation. This kit is for motors with a standard BIA bolt pattern only, and cannot be used with the Bobs Machine Mini Manual Jack Plate. This kit is available with different length bolts. Bolt Sizes Available 4 5 6 Kit Contains 4 12 SS Bolts 4 12 Nylok Nuts 8 Flat washers 4 Lock washers California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details