HOLO-KROME 68034 5/16-18 X 3/4" 內六角螺絲 | 低頭內六角驅動 | 合金鋼熱處理黑氧化物 (100 / 包)

Used these to secure a jig plate on my mill where standard socket heads stuck out too far. The low-head profile fit perfectly, and the black oxide finish should hold up fine in a shop environment.

I needed low-profile screws for a tight jig assembly, and these 5/16-18 x 3/4" socket cap screws fit perfectly. The hex socket drive made installation quick and easy.

Used a handful of these to assemble a custom jig for my drill press, and the alloy steel feels noticeably tougher than the cheap zinc bolts I’ve tried before. The black oxide finish held up well against a bit of cutting oil spray during the job.