1/2-20 × 3インチ ソケットキャップネジ | 六角ソケットドライブ | 米国製 | 合金鋼 サーマルブラックオキサイド (250/パック)

I needed these for a heavy-duty tooling fixture, and the black oxide finish is holding up much better than the plain steel ones I used before. The hex socket drive engaged cleanly on every single screw in the pack — no stripped heads or burrs.

For a jig that takes a beating daily, these alloy steel screws have held up perfectly—the black oxide finish still looks clean after months of shop use. Threads cut smooth right out of the box, and the 250 count means I won't need to reorder for a long time.

The hex socket drive made tightening these down in tight spots much easier than using a standard wrench. They feel incredibly solid and the black oxide finish looks clean on my new jig.