مسامير سداسية للماكينة 1/4-20 × 5 بوصة | فولاذ مطلي بالزنك | ملولبة جزئيًا (200 / عبوة)

Used these for a metal railing project and the grip length from the partial threading made tightening everything rock-solid. The zinc coating seems thick enough to hold up outdoors so far.

The partially threaded shank made alignment way easier when I was bolting through a steel frame. Zinc coating’s held up fine so far, and 200 pieces in one box means I’m set for a few projects.

I’ve been using these bolts for a few heavy-duty metal brackets, and the zinc plating has held up perfectly against rust, even in a damp garage. The 5-inch length gave me just enough reach through thick steel, and the partial threading made tightening a breeze.