Screws, for fuel tank kneepad rubbers ( knee grips), Norton, each. 1/4 inch x 26tpi (CEI) x 5/8 inch long, 7/16 inch diam, head height 3/32 inch cheese head ZP. Great confusion: The military parts book lists the screw as 5/16 inch but we have found tanks that take 1/4 inch screws and the rigid twin (Model 13) takes 1/4 inch Original part number: E6629 - kneegrip pin