1-3/4-5 X 4" 六角頭螺絲 | BD級合金鋼原色 | 全螺紋 (1個/包)

Used these to secure a heavy motor mount on a press, and the Grade BD alloy steel held torque beautifully without any hint of stretching. The hex head gave a solid, non-slip grip with a standard wrench, which made installation straightforward.

Finally, a hex bolt that doesn't strip the head when you put some torque on it. The Grade BD alloy steel feels much tougher than the usual hardware store stuff.

Threads smooth all the way down, and the hex head seated tight with my socket without any stripping. These grade BD alloy bolts held a stubborn jig in place exactly as they should.