1/4-20 X 3" 소켓 캡 나사 | 접시머리 육각 소켓 드라이브 | 부분 나사산 | 합금강 열처리 블랙 옥사이드 (100개/팩)

The hex socket drive made tightening these in tight spots on my jig much easier than using regular bolts. The partial threading gave me just enough grip for the material I was working with.

I’m using these to build a custom jig setup, and the flat head design sits flush perfectly in my counterbored holes. The black oxide coating has held up well so far without any rust spots, even in my damp garage.

I needed some partially threaded fasteners for a jig I'm building, and these 1/4-20 x 3" screws fit the bill perfectly—the black oxide coating gives them a nice, uniform finish. They drive smoothly with a hex key and hold tight.