1/2-13 X 3-1/2" 內六角螺絲 | 平頭內六角驅動 | 部分螺紋 | 合金鋼熱黑氧化物 (25個/包)

Had to swap out a stripped bolt on a jig fixture and these threaded in clean without any fuss. The thermal black oxide finish feels slick and should hold up fine in the shop. Exactly the size I needed, and the partial threading gave just the right grip.

The flat head design on these 1/2-13 screws sits perfectly flush in my fixture plate, and the hex socket drive made installation with an Allen wrench effortless. The thermal black oxide finish looks durable and professional on my press tooling.

The hex socket drive made torquing these down in a tight jig setup a lot easier than I expected, and the thermal black oxide finish looks uniform across all 25 pieces. Threads engaged cleanly on the first pass through my fixture plate, no binding or burs to clean up.