HOLO-KROME 68022 1/4-20 X 3/8" ソケットキャップスクリュー | ローヘッド六角ソケットドライブ | 合金鋼 サーマルブラックオキサイド (100 / パック)

These little screws have been perfect for my jig builds, the low head profile sits flush in tight spots where a standard cap screw would never fit. The black oxide finish looks sharp and hasn't chipped even after repeated wrenching.

Used a handful of these low head screws to secure a fixture on my milling table, and the hex drive made installation smooth even in tight spots. The thermal black oxide finish seems durable and hasn't flaked, which is exactly what I need for tooling applications.

The black oxide finish on these socket cap screws is holding up well in my jig setup, no signs of wear after a few weeks of use. The low head profile was exactly what I needed for tight clearance—these fit perfectly without binding. A solid choice for machinery work.