براغي رأس كبس 1/2-20 × 1 بوصة | محرك سداسي | صنع في الولايات المتحدة | فولاذ سبائكي معالجة حرارية أسود (250/عبوة)

The black oxide finish is exactly what I wanted for these socket caps, and they thread into my tooling with zero binding. For 250 pieces, the thread quality stays consistent across the whole pack, which is rare.

I needed a full pack for a custom jig I’m building, and these 1/2-20 x 1” screws fit the threaded holes perfectly. The hex socket drive makes installation quick without stripping—definitely solid for precision work.

The black oxide finish on these screws held up perfectly during assembly, no chips or scratches. Threads cut cleanly into tapped holes with zero binding—exactly what I needed for a jig rebuild.