براغي ذات رأس أسطواني 5/8-11 × 5-1/2 بوصة | محرك سداسي | صناعة أمريكية | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

These threaded perfectly into my jig fixture without any binding — the hex socket drive made installation quick with just an Allen key. The black oxide finish looks professional and should resist rust well in my shop environment.

Needed a full set of cap screws for a heavy-duty press fixture, and these 5/8-11 x 5-1/2" screws fit perfectly. The thermal black oxide finish seems tough and even, and the hex socket drove cleanly without any stripping.

Installed these on a jig I'm building for a production run and they seated perfectly with the hex drive. The black oxide finish looks clean and professional on the tooling. USA-made quality is obvious from the sharp threads and consistent length.