براغي رأس سداسي ثقيل 1"-8 × 3-1/2" | صناعة أمريكية | درجة A307 Grade B من الفولاذ مطلي بالزنك | خيط جزئي (35/عبوة)

The zinc plating on these looks clean and even, should hold up fine in my shop environment. Used them to bolt down a heavy workbench frame and they threaded in smoothly without any binding.

These are exactly what I needed for a heavy machinery repair, and the zinc plating looks like it will resist rust well. The threads are clean and started easily in the pre-tapped holes.

The partially threaded shank made these cap screws grip perfectly when I mounted heavy equipment to steel beams. The zinc coating looks clean and uniform, and the threads cut smoothly without binding or stripping the metal.