The Auto-Fit nipple is barbed rather than threaded. In assembly the nipple is pushed into rather than threaded into the hose. The hose is compressed between the nipple and the socket, sealing at the barbs. Hose retention is positive (the same as SWIVEL-SEAL) and there is no spiral path for possible leaks.
Auto-Fit hose ends are available in aluminum, steel and stainless steel. The lightweight aluminum hose ends are suitable for most applications. Steel Auto-Fit hose ends should be used when increased physical strength and/or resistance to alcohol fuels is required. The stainless units offer maximum corrosion and temperature resistance and are recommended for marine or chemical use and for exotic fuels.
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.