3/4-10 x 13" 內六角螺絲 | 六角驅動 | 部分螺紋 | 合金鋼熱處理黑色氧化

The black oxide finish held up through a full day of tightening in my jig setup without any wear marks, which surprised me. These 13-inch lengths are exactly what I needed for that deep machinery access.

The hex socket drive engaged perfectly with my torque wrench, and the black oxide finish looks like it will hold up well in my tooling setup. Threads were clean all the way down the 13-inch length, no burrs or binding on the first few installations.

Used these to build some custom jigs for a router table, and the partially threaded shank grabbed perfectly. The hex socket drive made installation straightforward even in tight spots. Exactly what I needed for precision work.