M20 X 45mm 杯端內六角止付螺絲 | 合金鋼鍍鋅 (25 / 包)

The hex socket drive made cinching these down in a tight manifold a breeze, and the cup point really dug into the metal once torqued. No stripping even after a few adjustments, so they’re holding up well under real use.

These cup point screws bit into my steel frame perfectly after just a few turns, and the zinc plating looks clean. The hex socket held the Allen key securely even with some heavy tightening.

Installing these in some heavy-duty fixturing, and the hex socket drive made it easy to apply plenty of torque without stripping. The zinc plating seems like it'll hold up well in a slightly damp shop.