Fuel Tank & Fuel Cell Bulkhead Fittings

Aluminum bulkhead fuel cell fittings are designed to install into a hole without welding and with simple tools such as AN wrenches. While standard steel wrenches can be used, AN wrenches are made of soft aluminum material that will not scratch the anodized finish as easily as a steel wrench. Once properly tightened, the nylon washers or O-rings create a leak-free seal between the fuel cell and the fitting.

The most common type of fuel tank fittings used in automotive racing applications is the AN (Army - Navy) fitting. Originally used for military plumbing beginning in WWII, these fittings have expanded to other industries including aviation, marine, and performance racing. AN fittings are made to be strong, leak and trouble-free, and to last a long time. They also do not use hose clamps, eliminating the need to tighten them and a possible weak point that can leak.

Bulkhead fittings are reusable connections that allow fuel hose to attach to a fuel cell with a male fitting on the outside and a nut on the inside with a washer or O-ring in between the outer part of the fitting against the fuel cell and between the nut and the fuel cell. Tightening the nut against the seals, fuel cell, and fitting creates a leak-free connection, allowing only fuel to go through the opening that connects to the hose.

All fuel cell and tank bulkhead fittings available from JEGS use AN (Army-Navy) thread. This style of bulkhead uses a 37-degree angle mating design and is compatible with braided stainless hose and AN hose ends most commonly found on high performance vehicle and race cars (in addition to marine, military, and aviation applications).

AN bulkhead fitting size is based on 1/16 of an inch for the hose inner diameter. For example -8 AN is 8/16" or 1/2" hose inner diameter. Below is a list of the most common bulkhead adapter fittings and specifications:

There are many options to buy fuel tank bulkhead fittings online, but only one clear online destination. With over six decades in the business, JEGS has been selling automotive plumbing components, including fuel cell fitting kits, for a long time, offers competitive prices, and ships in-stock items fast, often the same day.