Our FLEXTOP® Locknut is the premier all-metal locknut best used in demanding high vibration applications. This proven design is the ultimate all-metal locknut with the highest resistance to loosening of any reusable one piece nut. It works by allowing the crimped slotted top section to expand and grip the bolt as it passes through this area. Suitable for 800 degrees Fahrenheit, the FLEXTOP® Locknuts meet the locking torque requirements of MIL-N-25027 which includes 15 unseated installation and removal cycles. Available from stock in four styles including full height/light hex, full height/heavy hex, thin height/light hex and thin height/heavy hex. Available in both carbon and stainless steel.

Applications: Automotive engine and suspension, aerospace, agricultural and industrial applications.

FULL HEIGHT LIGHT HEX
FULL HEIGHT HEAVY HEX
THIN HEIGHT LIGHT HEX
THIN HEIGHT HEAVY HEX

All plating types are available for our products, including:

  • phosphate & oil;
  • cadmium;
  • trivalent/hexavalent zinc; and,
  • automotive organic finishes.

As a final coat, all products are coated with a U.V. traceable wax fluid to control torque-tension relationships. Certification is available upon request.

Technical Assistance

Customers can also take advantage of Locknut Technology's technical application expertise. Engineering assistance is available pertaining to use, application, grades, types of locknuts, plating, torque specs, etc. Many new fastener buyers have been guided by Locknut's help--insuring that they procure the correct part for their customer's application. Request a quote, , or call us at (630) 628-5330.