HOLO-KROME 08143 3/4" X 4-1/4" 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼 熱處理黑色氧化 (10 / 包)

These threaded rods are perfect for my jig build where the shoulder needed to act as a smooth pivot point. The precision ground surface ran true with no wobble once installed.

The hex socket drive made installation straightforward with my Allen wrench, and the thermal black oxide finish on these alloy steel screws seems tough enough to handle repeated adjustments. They fit perfectly as pivot pins on my jig, just needed a drop of oil on the shoulder to get smooth rotation.

The precision ground shoulder sits perfectly flush against my fixture plate, no wobble or chatter when I use it as a pivot point. The thermal black oxide finish has held up well after a dozen installs, and the hex drive bites cleanly every time. Exactly what I needed for a bearing surface.