HOLO-KROME 68046 3/8-16 X 1" 內六角螺絲 | 低頭內六角驅動 | 合金鋼熱處理黑色氧化 (100 / 包)

Replaced the old hex bolts on my milling machine's hold-down clamps with these low head screws; the black oxide finish handled the coolant spray without a speck of rust. They seated perfectly with a standard hex key.

Used these to rebuild a light-duty jig at work and the 3/8-16 threads cut clean without any galling, even on the first pass. The low head profile gave me just enough clearance under the fixture plate, which was a relief. Four stars only because the box of 100 is almost too many for my small shop, bu

The black oxide finish on these screws looks great and seems durable. They fit perfectly into my jig setup without any binding, and the hex drive made installation quick.