HOLO-KROME 65036 3/8-24 X 1/2" 內六角螺絲 | 圓頭內六角驅動 | 合金鋼熱處理黑色氧化 (50 / 包)

Threaded a few of these into a jig I’m building and the hex socket drive seated perfectly with no wobble, even at that short 1/2" length. The thermal black oxide coating gives them a clean, uniform look that’s held up fine so far. For fifty pieces at this price, they’re a solid buy for any precision

The black oxide finish on these is holding up perfectly in my jig fixtures, with no rust after several weeks of use. The hex socket drive grips cleanly, making installation quick and secure.

Was tired of stripping hex heads on cheaper bolts, but these button heads hold firm even at higher torque settings. The 3/8-24 threads cut cleanly into the jig I'm building, and the 50-count pack is perfect for stocking the shop.