HOLO-KROME 09144 10mm X 15mm 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 (25 顆/包)

Used these as pivots for a custom jig I built, and the fit on the shoulder is spot-on without any wobble. The black oxide finish held up well after a few hours of use too.

The precision-ground shoulder on these is spot-on—my pivot runs dead smooth with zero wobble. The black oxide finish also made them easy to handle under the work light, and all 25 arrived clean and defect-free.

Used these as precision pivot pins in a jig I’m building—the ground shoulder runs true and smooth with zero wobble. The black oxide finish looks good and seems to resist rust so far.