براغي رأس سداسي 2 بوصة-4-1/2 × 10 بوصة | درجة BD من سبائك الفولاذ العادي | ملولبة جزئيًا (1 / عبوة)

Wrestled these into place on a jig frame, and the hex head gave a solid bite for a socket without stripping. The BD alloy seems tough enough for repeated tightening, though the partial threading means you'll want full rod if you need a long grip.

The partially threaded design made seating these in a deep flange a lot easier than I expected for a 10-incher. The alloy steel finish is plain, but the hex head grabbed cleanly with a socket, and the threads held up without any galling. Solid choice if you need heavy machine fasteners that just wor

Had to torque these to nearly 400 ft-lbs on a conveyor spindle, and the hex head held perfectly without any rounding. The partial threading gave just the right grip for our application.