M12-1.75 X 50mm 內六角螺絲 | 內六角驅動 | 全螺紋 | 12.9級合金鋼鍍鋅 (200/包)

I’m putting these to work on a jig for my milling machine, and the fully threaded length gives a solid, even clamp across thick plates. The zinc plating held up fine after a few days in a slightly damp shop without any rust.

The hex socket drive made these a breeze to torque down evenly with an Allen key, and the zinc plating looks clean on my assembly fixture. For the price, getting 200 pieces of Class 12.9 alloy steel feels like good value.

Used a full bag on a new tooling jig and every single screw seated perfectly without any binding or galling. The hex drive held the bit securely even at higher torques, which made assembly much faster than I expected from a pack of 200.