براغي قفل مقبس HOLO-KROME 06020 1/2-13 × 1/4 بوصة | محرك مقبس سداسي | فولاذ سبائكي (100/عبوة)

Got these for a job where I needed to secure a set screw in a tight spot, and the 1/2-13 threads cut cleanly without any galling. The through hex socket makes it easy to drive with a standard allen key, and the alloy steel feels plenty rugged for the application.

Perfect size for locking down adjustment screws on my milling machine. The hex drive holds well without stripping, even with repeated adjustments.

Tightened these down on a jig fixture and they bit perfectly flush without any wobble. The through hex socket made driving them into tight spots a breeze. Solid hold so far.