1/2-13 X 6-1/2" 內六角螺絲 | 平頭內六角 | 合金鋼熱處理黑氧化物 (10個/包)

The black oxide finish is holding up perfectly after a week of clamping and unclamping on my fixture table, no rust or wear yet. The hex socket drive seated cleanly with no stripped corners, and the 6-1/2" length gave me just the reach I needed for a deep tooling setup. These feel solid enough for d

I needed some long fasteners for a jig I was building, and these 6-1/2" socket cap screws fit the bill perfectly. The hex socket drive made installation easy with a standard Allen key, and the thermal black oxide finish seems durable.

The black oxide finish on these screws is really nice and uniform, gave my jig a clean, professional look. I’ve used them for fixturing a heavy weldment and the hex drive seated perfectly without stripping. Definitely sturdy enough for the torque these need.