5/8-11 x 5" 六角頭螺絲 | 8級鋼鍍鋅 | 部分螺紋 (85 顆/包)

Had to replace some critical bolts on my press brake, and the partial threading on these made alignment way easier than fighting a fully threaded rod. They cranked down tight with zero deformation, exactly what you want for heavy machinery.

The zinc plating on these is flawless, no drips or bare spots, and the threads cut cleanly on the first pass. Got 85 of them and every single one torqued to spec without a single seizure or stripped head.

I needed a full box of these for a machine frame repair and the partially threaded length made alignment a lot easier than wrestling with fully threaded rods. All 85 came out of the bag with clean threads and no bent heads, so I didn’t have to send a single one back.