2"-4-1/2 x 11" 六角頭螺絲 | BD級合金鋼原色 | 部分螺紋 (1/包)

The hex head grabbed my 1/2" socket perfectly without slipping, and the partial threading made alignment on thick flanges much easier. These are solid, heavy-duty fasteners that feel like they'll handle serious torque.

Used these on a heavy-duty conveyor frame, and the hex head held up perfectly under my impact wrench without any rounding. The partially threaded design made alignment with existing tapped holes much quicker. Solid build for industrial use.

Had to torque these to 150 ft-lbs on a hydraulic press assembly, and the hex head took the socket drive perfectly without stripping. The partial threading made alignment with the tapped hole much faster than expected.