HOLO-KROME 08012 1/4" X 1-1/4" 內六角肩螺絲 | 內六角頭 | 六角驅動 | 合金鋼 熱處理黑色氧化 (25個/包)

The ground shoulder on these screws is dead-on accurate, making assembly of my custom tooling much smoother. They seated perfectly in my fixture without any wobble. Exactly what I needed for a repeatable pivot point.

I needed a solid pivot for a small jig and these screws fit perfectly, the hex socket drive makes installation a breeze. The black oxide finish looks clean and should resist wear well in my workshop.

I needed a precision shoulder for a small axle project, and the ground surface on these screws fit perfectly with zero wobble. The thermal black oxide finish seems durable too.