Allstar Bung & Cap Kit, Weld-On, 1.375" OD, Aluminum Bung / Aluminum Cap, Black Cap

Kits include a weld-in or bolt-in bung and an easy grip O-ring cap with positive seal. Kits are often used as an inspection plug or a filler plug. Small fill plugs have a 1-3/8" opening, and large fill plugs have a 3" opening.