HOLO-KROME 730003300 3/4-16 X 6" 內六角螺絲 | 六角驅動 | 合金鋼熱處理黑色氧化 (10 / 包)

These went straight into my fixture table and the threads are so clean they started by hand with zero binding. I’ve torqued them down hard and the alloy steel doesn’t show a hint of flex.

The black oxide finish on these screws gives them a solid, non-glare look that fits right into my tooling setup, and the hex socket drive made installation straightforward with an Allen wrench. For 3/4-16 x 6" alloy steel, they feel dense and well-balanced—no wobble or thread issues on the first pas

Used these to secure a heavy-duty press frame, and the black oxide finish held up perfectly against shop grime. The threads were clean and started smoothly, no binding at all.