7/8-14 × 3-1/4" براغي ذات رأس أسطواني | محرك سداسي | ملولبة جزئيًا | فولاد سبائكي أسود حراري (10/عبوة)

Needed a set of high-strength bolts for a fixture I was building, and these black oxide ones slid right into the tapped holes without any binding. The partially threaded section let me get a solid clamp on the work piece without bottoming out. Exactly what I was looking for.

Put these in my drill press jig and the partial threads grabbed perfectly while the smooth shank centered in the bushing. The hex socket drive made torquing them down solid with no cam-out.

The black oxide finish on these screws held up perfectly when I tightened them into a steel jig fixture, no galling at all. The hex socket drive engaged cleanly without stripping.