1-1/8-7 x 15 英吋 六角凹頭螺絲 | 六角驅動 | 部分螺紋 | 合金鋼 熱處理黑色氧化物

I needed some heavy-duty screws for a jig I was building, and these cap screws fit the bill perfectly. The 15" length was just right, and the hex socket drive made installation straightforward with no stripped heads.

The thermal black oxide finish feels tough and uniform, and the hex socket drive seated perfectly on my torque wrench without any slippage. I used them to bolt down a heavy jig plate and the 15" length gave me plenty of grip for the partial thread engagement.

The partially threaded design made aligning them in my press fixture much easier than expected. These screws feel solid and well-made right out of the box. Exactly what I needed for a heavy-duty tooling repair.