M12 X 30mm 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼 (25個/包)

Used a couple of these as pivot pins on a jig I’m building and the socket drive made tightening them into tight spots way easier than a hex head would. The shoulder is smooth and slides through the bearing bore without any wobble. Solid set for the price.

The precision-ground shoulder makes these screws slide perfectly into a bearing I'm rebuilding, and the hex socket drive is easy to torque without stripping. Exactly what I needed for a solid pivot point.

Used one of these as a pivot pin on a custom jig I'm building, and the precision-ground shoulder gave it a perfectly smooth, wobble-free rotation. The hex drive made installation a breeze with no cam-out. Definitely getting another pack for future projects.