Inconel Nylon 625 lock nuts are ideal in many extreme applications, especially when vibration or shock loading makes nylon inserts necessary to reduce nut loosening.

Inconel 625 brings good corrosion resistance, high-temperature resistance, and ultimate tensile strength to a lock nut.

Made of nickel and chromium, Inconel 625 has high oxidation and carburization resistance. These lock nuts are resistant to a wide range of corrosive environments of unusual severity including sulfuric acid, hydrochloric acid, and phosphoric acid.

Inconel 625 Characteristicsinconel nylon 625 lock nuts

  • Non-magnetic
  • Corrosion resistant
  • Oxidation resistant
  • Carburization resistant
  • Nickel-based alloy
  • Cryogenic to 2000°F temperature range
  • High corrosion-fatigue strength
  • High tensile strength

The molybdenum in Inconel 625 delivers excellent fatigue strength and resistance to stress, pitting and crevice corrosion cracking even when exposed to chloride ions making it an excellent choice for seawater applications. It is commonly used in submerged applications by the Navy on submarines and boats.

Standard Pattern

  • NE
  • NM
  • Thin Pattern
    • NTE
    • NTM
    • Thin heavy pattern
      • NTU
      • Heavy Pattern
        • NU
  • Custom Upon Request 


  • Aerospace industry
  • Chemical processing
  • Nuclear industry
  • Heat shields
  • Furnaces
  • Seawater applications
  • Nuclear power plants: core and control rod bolts
  • Gas turbine engines
  • Pollution control equipment
  • Submarine
  • Navy
  • Flare stacks

Whether you need a standard or custom size, KD Fasteners has a solution for you. Products are made in the USA. Contact us today by calling 1-800-736-5014 or filling out our contact form.