مسامير رأس كبس بمقبس 9/16-18 × 4-1/2" | محرك مقبس سداسي | ملولبة جزئيًا | سبائك فولاذ معالجة بأكسيد أسود حراري (25/عبوة)

Just got these in for a jig I'm building, and the black oxide finish looks really clean under shop lights. The hex socket seated perfectly on my driver with zero wobble, and the 4-1/2" length gives me plenty of grip through thick steel plates.

The partially threaded design made them perfect for a jig I was building, and the hex socket drive seated easily with my Allen key. They feel solid and well-made for the price.

The black oxide finish on these screws looks sharp and held up without any smudging during assembly. Threads engaged cleanly into my jig fixture, and the partial threading gave just the right grip depth for a 4-1/2" bolt. Solid set for the price.