M18-2.5×200mm 六角ボルト | 10.9級 鋼 無処理 | 部分ねじ (36個/パック)

The partially threaded design made aligning them in the frame much easier, and the hex head bit into the socket without slipping. They feel solid for heavy assembly work, no complaints.

I needed these for a heavy equipment jig assembly, and the 10.9 grade steel handles the torque without stripping the hex head. The 200mm length with partial thread worked perfectly for clamping thick flanges.

Finally got these M18 hex head bolts in and the 10.9 grade steel feels really solid for heavy machinery work. The partial threading on the 200mm length gave me exactly the grip I needed for bolting down a thick steel bracket.