5/8-11 X 5-1/2インチ ソケットキャップスクリュー | フラットヘッド六角ソケットドライブ | 半ねじ | 合金鋼 サーマルブラックオキサイド (10個/パック)

I needed some heavy-duty fasteners for a jig I’m building, and these 5/8-11 x 5-1/2" screws with the hex socket drive were a perfect fit. The black oxide finish feels sturdy and resistant to rust, which is a bonus for my shop. They threaded in smoothly without any binding.

The black oxide finish on these has held up without a single spot of rust after a month sitting in my damp shop. Torqued them down on a fixture plate and the hex socket bit grabbed cleanly every time.

Finally, a bolt that fits the jig I built without slop — the partial threading on these 5-1/2" screws grabs just right. The thermal black oxide finish looks sharp and hasn't shown a speck of rust after a week in my damp garage.