六角穴付きボルト M16-2 X 250mm | クラス8.8 鋼 無処理 | 部分ねじ (40本/袋)

Worked perfectly for bolting down my metal lathe to the concrete floor — the partial threading made alignment much easier than full-thread bolts would have.

Torqued these down on a press frame this morning and the Class 8.8 steel took the full load without a hint of yielding, the partial threads bit cleanly into the tapped holes. Packaging held up well too, all 40 arrived with zero rust or dings.

I needed heavy-duty bolts for a fabrication jig, and the 250mm length with partial threading worked perfectly for deep clamping. The hex head gave my socket a solid bite without any rounding.