Yinpecly 10-Pack M8x1.25 Serrated Flange Nuts – 316 Stainless Steel, Silver, Locking Design

About This Product

If you need fasteners that stay put even with vibration, these Yinpecly M8 serrated flange nuts are a solid choice.
Each one has a built-in wide flange at the base that acts like a permanent washer, spreading the load evenly across the surface.

The serrations on the flange face bite into the material when tightened, preventing the nut from backing off due to shaking or movement.

Made from 316 stainless steel, they’ve got excellent corrosion resistance—better than 304—so they’re great for outdoor, marine, or humid environments.

The silver, unfinished surface keeps it simple and clean.
Thread size is M8 x 1.

25mm pitch, with a hex width of 16.
4mm and a height of 7mm.

Flange diameter is 12.
9mm, giving good surface contact.

One thing to note: the serrations can scratch softer materials, so they work best on metal surfaces where that locking grip really shines.

They’re not meant to be used with separate washers—the flange covers that job.
Perfect for automotive, equipment, machinery, or any application where nuts tend to loosen over time.
This 10-pack gives you a good supply for projects or spares.