مسامير ماكينة سداسية 5/16-18 × 3 بوصة | فولاذ مطلي بالزنك | ملولبة جزئيًا (100 / عبوة)

Zinc plating is holding up well so far, no rust after a few days in a slightly damp garage. The partial threading made it easy to get a clean, tight connection on my steel brackets without the threads binding.

The unthreaded grip length on these bolts made aligning my steel brackets much easier than dealing with fully threaded hardware. Zinc coating looks clean and consistent across all 100 pieces, and the partial threads bit smoothly into my tapped holes.

Installed these on a trailer hitch project, and the unthreaded grip section made alignment a breeze. All 100 bolts had clean, consistent threads and the zinc held up fine during tightening.