3/8-16 x 1-1/2" 六角機械螺栓 | 鋼鍍鋅 | 部分螺紋 (100個/包)

The unthreaded grip length on these made alignment much easier when I was bolting a heavy steel bracket to a frame. They feel solid and the zinc coating seems durable so far.

I needed a solid grip length for a trailer hitch bracket, and these partially threaded bolts gave me exactly that without having to stack washers. The zinc coating looks clean and should hold up well in my workshop environment.

The hex heads fit my socket perfectly, and the zinc plating looks clean and uniform across all 100 bolts. I used them for a small trailer hitch repair, and the unthreaded grip section made alignment much easier than dealing with fully threaded bolts.