An alloy banjo bolt threaded M14x1.25 with a 22mm shank. M14 sits at the larger end of the common banjo range and generally serves higher-flow fuel and oil ports rather than small brake unions, where the greater through-bore of the bolt is genuinely useful. The fine 1.25 pitch gives fine control over how the sealing washers are crushed, which is the whole basis of a banjo seal. The 22mm length suits a single banjo eye with a washer above and below. Fresh crush washers each time are essential, and because the bolt is alloy rather than steel it should be tightened to a firm feel rather than a heavy pull.