The Nuke Performance CFC Unit is able to be mounted to any type of fuel tank/fuel cell with this aluminum 6x 10" 24-bolt pattern flange. The Nuke Performance aluminum flange uses the well known 24-bolt 6x 10" pattern and is made for either welding to an aluminum fuel cell or to be fitted with countersunk bolts to be held in place. Made of lightweight, high-quality aluminum and is delivered unoxidized to make it possible to be welded to an aluminum fuel cell, if wanted. Thread size : 1/4-28 UNF x 3/4 This is a good solution for those who want to use/manufacture a custom fuel cell to their own specifications. Together with the Viton gasket that is provided with the CFC Unit, it makes a perfect seal, safe for all types of fuels. Delivered without bolts or gasket. Both bolts and gasket are included with the Nuke Performance CFC Unit (150-05-201). Quantity : 1pc