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Solutions: Specialty Threaded Nuts & Bolts


Perfect for providing prevailing torque!

SinuLOC™ addresses the need to enhance a machine screw’s ability to stay secure for the life of its joint. Prevailing torque nuts and nylon patches or pellets are popular alternatives but costly solutions until now.

With SinuLOC, there is no need for

  • lockwashers
  • prevailing torque locknuts
  • adhesive or nylon patches

SinuLOC fastener’s unique engineered thread locks the position of the bolt, even without clamp load in the joint.

How SinuLOC locks bolt positionThe SinuLOC feature generates prevailing torque by using alternating pressure flanks in the joint. It is compatible with all internal thread types.

Features and Benefits

Ergonomic—prevailing torque where you want it and when you need it.
Secure—high prevailing off-torque is engineered into the thread. SinuLOC WILL NOT LOOSEN, even without clamp load in the joint.
Reusable—BEST IN CLASS prevailing torque for repeated uses.
No special considerations— will perform as designed with standard mating hole tolerances. Any female threaded system can be used: nut, blind hole, stamped thread, etc.

To learn more about SinuLOC, please click here or contact an EFC International Representative at 800-888-3326.