Bulkhead fitting is made from billet heat treated steel and is cad plated for corrosion protection. Fitting includes a anodized alum. jam nut and two Buna O-rings that are fuel resistant.
Threads are AN ORB. Pictures two, three and four are pictures of part #340-0058. Pictures five and six are of part number #340-0062. Most fittings are no longer plated and bare steel finish.
Racer can choose fitting from drop down menu.