M16-2×400mm 六角穴付きボルト | 強度区分10.9 スチール無メッキ | 半ねじ (3本入り)

These M16 bolts are exactly what I needed for a machinery mount—the partially threaded design gave me plenty of grip while still leaving room for spacers. The hex heads seated perfectly with a standard socket, and the 10.9 steel feels rock solid. Three in a pack is a fair deal for the price.

Used these to bolt down a heavy-duty press in the shop, and the 10.9 grade steel held perfectly under full load with zero stretch. The hex head made torquing them down easy with a standard wrench.

The hex head grabbed my socket wrench perfectly and the 400mm length was exactly what I needed for that heavy machinery tie-down. Class 10.9 steel feels properly solid, and the partial threading made alignment a lot easier than I expected.