HOLO-KROME 76380 M12-1.75 X 50mm 內六角螺絲 | 六角驅動 | 合金鋼熱處理黑色氧化 (50顆/包)

Needed some strong bolts for a jig I’m building, and these M12s fit perfectly right out of the box—the socket drive felt snug and precise when I torqued them down.

Threads were clean and uniform out of the box, no burs or sloppy machining on the hex socket. Used them to bolt down a fixture plate and they seated perfectly without any galling. These are exactly what you want for jig work.

Picked up a pack for jig and fixture work, and the black oxide finish held up well against shop grime. The hex socket drive seated perfectly with no stripping, even at higher torque settings. Solid hardware for the price.