M10-1 x 40mm 六角頭螺絲 | 等級10.9 鋼 無處理 | 全螺紋 (550個/包)

Packed the full 550 pieces in one sturdy box, and every single one came out of the bag with clean threads and no oil residue. The hex heads fit a 17mm socket perfectly, so driving them into steel brackets was quick work. Good value for the price, though I wish the bag had a resealable top for long-t

These bolts came in handy for a project mounting heavy steel brackets; the Class 10.9 rating gave me confidence they won't snap under load. I've used cheaper packs before, but the threads on these are noticeably cleaner and engage smoother.

The threads cut cleanly and the hex heads seated perfectly with a socket wrench, no stripped corners or wobble across the whole 550 count. Class 10.9 steel feels solid for the machine frame I bolted together, and the fully threaded length gave me good grip adjustment. Exactly what industrial fasteni