12mm to 1/2" Quick Connect Fuel Fitting A624A58 55 04 is an S&B fuel tank accessory for compatible diesel fuel-system and replacement-tank installations. The 12mm to 1/2" quick connect fuel fitting configuration should be matched to the hose, line, and tank connection required by the installation instructions. Because fuel fittings are application-sensitive, verify thread size, quick-connect size, and system compatibility before ordering or installing. Original description written from the row's SKU, category, and title data for S&B part TI1208-00.