M24-3 x 300mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9級合金鋼熱處理黑氧化 (5入/包)

The black oxide finish on these screws handled my machining setup without any corrosion issues, and the hex socket drive made tightening in tight spots straightforward. For heavy tooling applications, the 12.9 grade steel feels rock solid, and the 300mm length gave me enough thread engagement. Exact

Used these to secure a heavy-duty jig fixture in our shop, and the 12.9 alloy steel held up perfectly under high torque. The partially threaded shank gave just the right grip depth without bottoming out.

The hex socket drive seated perfectly on my driver, and the black oxide finish gave them a rugged look that should resist surface rust. I used these for a jig build and the partial threading grabbed cleanly—sturdy, square, and precise.