45-degree push-on hose end in AN6 (-6), pushing straight onto socketless hose and gripping the barb without a clamp or crimped socket. AN6 is the everyday size: carburettor fuel feed, EFI returns, coolant overflow and header-tank runs, PCV and light oil plumbing on most street and club-level builds. Forty-five degrees is the most-used angle on any build, steering hose around brackets, rails and pulleys while keeping the bend radius easy. It offers enough bore for typical fuel and coolant duty without the bulk of the larger sizes. Match the hose to the fluid you are running and seat it fully before pressurising the line.