براغي سوكيت سيت بمقبس نقطة كوب مقاس M4 × 40 مم | فولاذ سبائكي (100/عبوة)

Had to swap out a set screw on a stubborn pulley, and these M4 cup points grabbed the flat spot perfectly with the hex socket. The 100-pack means I'll have spares for years, too.

The hex socket drive on these screws fit my driver perfectly, making adjustments in a cramped cabinet space much easier than I'd expected. The cup point tip seated flush without stripping the metal surface.

I needed some extra-strong set screws for a small jig I'm building, and the cup point on these digs in perfectly. The hex socket drive made them easy to tighten even in a tight corner, and the 40mm length was just right for my application. No stripped threads or fuss.