What are Tubtara® blind rivet nuts?

A Tubtara® blind rivet nut is a mechanical fastener that ensures a strong thread in:

  • Thin metal plates/profiles: no thread forming possible
  • Thick metal plates/profiles: too hard for thread forming or on site repair
  • Composites or plastics: no thread forming possible


  • You install the Tubtara® from one side of the workpiece
  • This is useful in applications where there is little or no access from/at the rear
  • Ideal for use in boxed or enclosed applications


  • The Tubtara® can clinch separate sheets together (therefore acting as a rivet)


  • The Tubtara® provides a strong thread in a plate or profile
  • Enabling the assembly of other components via a bolt or screw

Tubtara® blind rivet nuts are used in all kinds of sheet metal and composite applications. They eliminate the need for tapping, welding or working with nuts and bolts. As such, they form an ideal solution for enclosed applications that can only be accessed from one side.

What's a Tubtara blind rivet nut?


The terminology of a Tubtara blind rivet nut  
  1. Screw or bolt inserted for assembly
  2. Assembled part
  3. Workpiece: can be 1 sheet or several sheets which require clinching
  4. Bulb or counter head: the chamber (unthreaded section) is deformed during setting
  5. Strong, secure internal thread 
  6. Open or closed end: closed-end version prevents the ingress of dirt and fluids especially in combination with an under-head seal
  7. Chamfer: leads the Tubtara® into the hole
  8. Shank: round, (semi-)hexagonal, knurled or splined version
  9. Grip: the exact material thickness of the workpiece
  10. Head: flat, countersunk, low profile, watertight, anti-turn head or customised head types


Product description

Steel M5 RS UFO 40 
Stainless M10 H SPX 35
Aluminium M8 - UPO 80
Steel M6 - MPO 50
Steel M4 KN UKO 30




head & shank

max grip

    RS: splined U / S: Unigrip 40 = 4 mm
    H: hexagonal M: Multigrip 35 = 3,5 mm 
    KN: knurled F: countersunk head 80 = 8 mm
    -: round P: flat head 50 = 5 mm
      K: low profile head 30 = 3 mm
      O: open end  
      X: closed end