M16-2×170mm 六角穴付きボルト | 六角穴駆動 | 部分ねじ | クラス12.9 合金鋼 熱処理黒染め (10本/パック)

I needed some heavy-duty fasteners for a jig I was building, and the partially threaded design made alignment much easier than fully threaded bolts. The thermal black oxide finish has a nice, uniform look and feels durable out of the box. These should hold up well under the repeated clamping loads i

class 12.9 is no joke—these screws seat perfectly in a fixture plate I’m building and the black oxide finish made them easy to torque without galling.

I needed 170mm fasteners for a jig build, and these M16-2 socket caps fit perfectly with their precise thread length. The hex socket drive seated cleanly without stripping, and the 12.9 alloy steel feels rock solid under load.