مسامير آلة سداسية 5/16-18 × 1-3/4 بوصة | فولاذ مطلي بالزنك | ملولبة جزئيًا (250/عبوة)

The zinc plating on these bolts looks even and clean, so they should hold up well in my shed where things get damp. Sizing matches the ASME spec exactly, and the 250 count means I have plenty for my trailer repairs and future projects.

The partially threaded shank made aligning these bolts in a steel bracket much easier than fighting with fully threaded ones. They seated firmly with a wrench and the zinc plating looks clean—no stripping on the first few I used.

After struggling with cheap bolts that stripped too easily, I finally upgraded to these partially threaded machine bolts from a standard hardware pack — the grip length kept my fence brackets rock solid.