Cap and Bung Assembly, Pro Star 2.75" Style, Aluminum Bung

Cap and bungs have many uses. Normally we see them used to fabricate fuel tanks or installed to be used as filler/inspection caps on differentials or valve covers. The bung can be ordered in steel, aluminum and in some cases stainless steel. The caps are all aluminum. We offer these caps with internal (female) or external (male) threads.