7/8-9 X 5" 重型六角頭螺絲 | 美國製造 | A307 B級鋼鍍鋅 | 部分螺紋 (35個/包)

I was honestly expecting cheap imports, but these hex cap screws have real heft and the zinc coating is uniform with no flaking. The partial threading made alignment on my equipment frame easy since the smooth shaft takes the stress.

Installed these on a jig I use daily and the partially threaded length grabbed just right — no wobble after a week of vibration. The zinc coating’s held up better than the last batch I bought from a hardware chain, and all 35 threaded clean without a single stripped one.

Finally, a fastener that threads clean without galling. The partial thread on these 7/8-9s grabbed perfectly in my equipment mount, and the zinc finish has held up through a week of wrenching without a speck of rust.