براغي رأس مقبس 7/16-14 × 4 بوصة | رأس مسطح بمقبس سداسي | خيط جزئي | فولاذ سبائكي مع أكسيد أسود حراري (50/عبوة)

The hex socket drive seated perfectly on my Allen wrench, no stripping or wobble even when I torqued them into my fixture. Partially threaded length is just right for clamping two plates without bottoming out, and the black oxide took a light oil wipe without smudging.

The thermal black oxide finish on these screws held up perfectly during assembly without any flaking. Used them to secure a heavy-duty jig fixture, and the hex socket drive made tightening them in tight spots effortless.

The partially threaded shaft grabbed exactly where I needed it to for a jig I’m building, and the black oxide finish slid into the blind hole without any galling. These feel properly heat-treated, not the soft stuff you get at the big box.