4" Staubkappe Cam & Groove | Tough-Tite | Aluminium

Finally got around to replacing my old plastic dust plugs with these aluminum ones and the difference in feel is night and day. The cam lock groove engages with a satisfyingly solid click, and it fits perfectly in my 4-inch female coupler.

I was worried the aluminum might dent easily, but this 4" dust plug feels solid and machined perfectly to seal the coupler tight. It clicks right into place without any wobble, and the surface is smooth enough that dirt wipes right off.

This aluminum plug is nice and lightweight but feels solid enough to take some abuse. It locks into the 4-inch coupler with a satisfying click and keeps the dust out perfectly. Exactly what I needed to seal the line when the hose is off.