Inconel 725 hex nuts are an excellent choice for the petrochemical and processing industries. They are also commonly used for marine applications requiring high strength fasteners that are able to resist corrosion, pitting and crevice attack in sea water.

KD Fasteners, Inc.’s Inconel 725 hex nuts have high strength, high ductility, toughness and resistance to corrosion.

In fact, Inconel 725 hex nuts are twice the strength of Inconel 625 thanks to its heat treatment. Made with nickel, chromium, molybdenum, and niobium, Inconel 725 is an age-hardenable alloy that has essentially the same corrosion resistance as Inconel 625. Importantly, Inconel 725 is resistant to hydrogen embrittlement and stress-corrosion cracking.

 Inconel 725 Characteristicsinconel 725 hex nuts

  • Resistant to stress-corrosion cracking
  • Resistant to sea water
  • Excellent fracture toughness


  • Aircraft
  • Hangars
  • Springs
  • High-strength marine applications
  • Sour gas service
  • Chemical processing
  • Aerospace
  • Oil and gas industries

Whatever Inconel 725 hex nuts you’re looking for, if we don’t have it on our shelf in one of our standard sizes (¼ to 3-inch diameter), we can quickly manufacture if for you. We will custom make your Inconel 725 hex nut to your exact specifications. Whether you need a standard or custom size, KD Fasteners has a solution for you. Our hex nut styles include:

  • Finished hex
  • Machine screw nut
  • Heavy hex nut
  • Nylon insert lock nuts
  • Top lock nuts

Contact us today by calling 1-800-736-5014 or filling out our contact form.