Bulkhead fittings are versatile and handy fittings when you want to pass through a fire wall, tank, panel, fuel cell or a vehicle bulkhead. Basically a bulkhead fitting seals off an area with the use of the jam nut. There is no need for grommets and passing long lengths of hose through the vehicle. A real time saver! 832-03-BLK 832-04-BLK 832-06-BLK 832-08-BLK 832-10-BLK 832-12-BLK 832-16-BLK