M10-1.5 X 60mm 六角穴付きボルト | 平頭六角穴付き | 半ねじ | クラス12.9 合金鋼 熱処理黒色酸化 (100本入)

The hex socket drive on these is machined precisely—my allen key seated with zero wobble, which made torquing them down in a jig a breeze. The black oxide finish looks uniform across all 100 pieces, and the partial threading gave me just the right grip for the clamping force I needed.

The heat-treated threads cut cleanly into my steel jig plate without a single stripped hole, and the black oxide finish already looks like it’ll resist shop grime. I’ve used the partial threading to clamp two 25mm plates snugly, and the hex drive seated perfectly on every one of the hundred.

Finally got these for a heavy-duty fixture build, and the 12.9-grade steel felt reassuringly tough while tightening. The hex socket drove smoothly without any rounding issues, and each screw threaded cleanly into the M10 holes.