Monel flat washers are strong, resistant to many corrosive conditions, and durable in high and low temperatures. These characteristics make Monel flat washers ideal in the aerospace, marine and chemical processing industries.

Monel flat washers are incredibly durable spacers providing the smooth bearing surface needed to distribute the fastener load over a wide surface area.

Monel’s high strength and good corrosion resistance is due to its nickel and copper components. It is also resistant to hydrofluoric acid and tough through high and low temperatures.

Monel Characteristics:monel flat washers

  • Resistance to hydrofluoric acid
  • Resistance to sea water
  • High strength
  • Good toughness at high temperatures

Additionally, our Monel flat washers can be through hardened for added strength and protection.


  • Marine
  • Chemical processing, especially hydrofluoric acid
  • Petroleum drilling
  • Aerospace

Monel flat washers are available in Monel 400 and Monel 500. We can manufacture washers to the specific dimensions and plating that you need. We offer off-the-shelf sizing ranging from 0.062 to 12 inch inside diameter and thicknesses from 0.002 to ½ inch.

Standard line:

  • ASTM F436
  • USS
  • SAE
  • Fender washers
  • Mil-Carb
  • Type B flat washers
  • Split lock washers
  • Internal
  • External
  • Internal/external lock washers
  • High collar lock washers

Metric line:

  • Din 125 A/B flat washers
  • Din 433 small series flat washers
  • Din 9021 fender washers

Whatever Monel flat washer you’re looking for, if we don’t have it on our shelf, we can quickly manufacture if for you. Our washer manufacturing capabilities range from small (under 100 pieces) to large runs. We will custom make your Monel flat washers to your exact specifications. Contact us today by calling 1-800-736-5014 or filling out our contact form.