Word needed, "bump" at end of cylinder

[misterroy]

Hi, looking for the technical name for a small cube at the end of a cylindrical button, the button gets fed through the cover and the cube stops the button coming right through. There are four cubes if that makes any difference. ta

[Andy Dingley]

Hard to understand what you're describing here, but they'd usually be termed a "lug" and may be part of a "bayonet lock" (if you rotate the cylinder to lock it in place using the lugs).

[Graham.]

Flange? A protruding rim, edge, rib, or collar, as on a pipe shaft, used to strengthen an object, hold it in place, or attach it to another object.

[:Jerry:]

Lug.

[misterroy]

thanks, it wasnt even near the tip of my tongue, but they are lugs.