M12 X 20mm 杯頭內六角止付螺絲 | 316 不鏽鋼 (100 / 包裝)

The cup point design seated perfectly flush in my metal railing project, and the hex drive let me torque them down firmly without stripping. I’ve used cheaper stainless bolts before, but these 316s are clearly resisting corrosion better already. Exactly the quality I needed for marine-grade outdoor

The hex socket drive made installing these in the engine mount bracket a breeze, even with limited tool clearance. The 316 stainless steel feels substantial compared to the regular steel ones I've used before.

Finally got around to swapping out the old bolts on my boat's railing with these — the 316 stainless is exactly what you need for saltwater exposure. The hex socket drive made tightening them in those tight corners a breeze.