HUB CAP LARGE 6 HOLE GREASE (DELETE WHEN SOLD)

It typically covers the outer bearing, allowing grease to lubricate the bearings while keeping dirt and water out. You replace it when the cap is damaged, dented, or leaking, as a damaged cap can compromise the hub and cause bearing failure. The 'DG' designation commonly refers to a 'Dual Guard' style, which is a rigid grease cap often found on commercial and utility trailers.