براغي رأس أسطواني M12-1.25 × 75 مم | محرك سداسي داخلي | خيط جزئي | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (50 / عبوة)

Installed these on a custom jig I’m building and the hex socket drive made tightening in tight spots much easier. The partial threading gave me just the right grip depth for the load. Solid hold so far.

The black oxide finish looks sharp on these and held up perfectly when I torqued them down with a hex key. Thread engagement on the partially threaded portion is clean, and all fifty arrived with consistent coating—exactly what I needed for a precision fixture.

Used these for a heavy-duty jig build and the 12.9 alloy steel is definitely up to the task, the black oxide finish also resisted scratches during assembly. Fit perfectly into pre-tapped M12 holes with no binding.