Flat nuts

Flat Nuts

Die Co. flat nuts come in 25 standard formats – the most commonly requested sizes and designs or they can be customized for a specific application.

All of our flat nuts are made from spring steel and will not loosen due to vibration. Their self-locking design makes them easy to install and remove without special tools. And they are lower cost than most alternative fasteners. Flat nuts are a good option when physical space is limited.

Our flat nut product line also includes:

  • W nuts
  • Twin nuts – with various center-to-center distances

Browse the selection of Die Co. flat nuts in our product catalog, contact us to customize a flat nut for your application or check for a competitor part on our cross reference list.


  • Available for sheet-metal screw sizes #4A to #14A and machine screw sizes 4-36 to 5/8-11
  • Various styles, including:
    • Rectangular
    • Flat or arched
    • Ends turned up
  • Various finishes, including:
    • Soluble oil
    • Phosphate & oil
    • Phosphate & water-based paint
    • Zinc electroplate
    • Water-based zinc coating


  • Withstands vibration
  • Provides tension without causing damage
  • Eliminates the need for lock washers
  • Easy installation and removal
  • Reliable Die Co. quality
  • On-time delivery

Find a part number

Learn more about Die Co. flat nuts and find part numbers in our product catalog or check for a competitor part on our cross reference list.

Request a quote

Request a quote now – or call 440-942-8856 to speak with a Die Co. representative.

Need help?

Email a Die Co. representative – or call 440-942-8856 – and tell us what you need. One of our fastener experts can help you find or design the best flat nut for your application.

Need a product drawing or sample? We can provide that too

We look forward to helping you get the spring steel fasteners you need, on time, every time.