M4-0.7 x 45mm 機械螺絲 | 圓頭一字槽 | 鋼鍍鋅 (600個/包)

These screws snugged perfectly into some M4 threaded inserts I use for jigs. The slotted heads are a classic touch and the 45mm length was just right for a 12mm panel. Solid finish with no burrs on the threads.

Zinc coating has held up well on a couple outdoor brackets I've used them for, no rust after a few weeks of rain. The cheese head gives a nice grip for the slotted driver, and at 45mm they're just the right length for my metal-to-wood joins.

Installed these into some wooden jigs I’m building for the workshop, and the slotted heads let me get a nice tight grip with just a standard screwdriver. The zinc coating gives me confidence they won’t rust even if the jigs sit in a damp garage.