technical data Tubtara®

On our technical information page, you will find all the necessary technical details about Tubtara®, our high-quality blind rivet nuts. Our products are specially designed for demanding applications in various industries such as the automotive, aerospace, construction, and electronics industries. Here, you can discover our specifications, dimensions and more, to make the best choice for your project.

If you have any further questions about our products or would like to receive more information, please don’t hesitate to contact our product specialists. Our team is ready to assist you and answer all your questions.

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Technical data

GENERAL TOLERANCES

  Head forms Dimensions in mm Dimensions in inches
D (head diameter)

Flat head
Countersunk head
Low profile head

 ± 0,35
0 -0,5
-0,15 +0,3		 ±.014
0 -.020
-.006 +.012
K (head thickness)  Flat head 
Countersunk head
Low profile head		 ± 0,15
0 +0,3
-0,05 +0,3		 ±.006
0 +.012
-.002 +.012
L (length) General
Stainless M10 shank 13 mm		 ±0,35
±0,5		 ±.014
±.020
Metric thread= 6H      
Shank size General (incl. KN)
Splined shank (RS)
M10 shank 12,4 mm		 -0,02 -0,15
±0,08
±0,08		 -.001 -.006
±.003
±.003

 

Example:

General Tolerances Tubtara

 

RECOMMENDED TIGHTENING TORQUE VALUES (Nm)

Max. recommended torque to avoid damaging the threaded connection and to ensure optimal screw-nut assembly:

  M3 M4 M5 M6 M8 M10 M12
Aluminium 2,0 2,2 4,5 9,5 17,0 30,0  
Steel 2,5 3,0 5,9 11,0 25,0 49,0 80,0
Stainless Steel 2,5 3,0 5,9 11,0 25,0 49,0 80,0

Recommendations for 8.8 bolts in steel and class A2-70 bolts in stainless steel.

 

MECHANICAL PROPERTIES

The following tables offer a handful of indicative standard values for Tubtara® blind rivet nuts with a round or hexagonal shank and flat head in first grip:

In practice, variations may result from differing setting and environmental conditions. The values mentioned can be used as a reference and optimised by using additional features. We strongly advise customers to perform their own tests in the correct material thickness and specific application.

 

TESTING METHODS

In addition to the standard inspections during the blind rivet nuts’ production process, the following tests can be done at the customer’s request:

  • Pull-out test
  • Maximum torque
  • Push-out test
  • Shear test
  • Torque-to-turn
  • Length under plate
  • Size bulb forming

 

HX TUBTARA BLIND RIVET NUT WITH SEAL UNDER THE HEAD

Information about NBR O-Ring and compatibility with other products:

Shore Hardness 70 - 95   Aromatic
Hydrocarbons		 x   Lye x
Hydraulic fluids xxxx   Aliphatic
Hydrocarbons		 xxx   Chlorinated 
Hydrocarbons		 x
Fuel Oils xx   Water under 80°C xxx   Ozone & Sunlight x
Organic Oils xxxx   Water over 80°C x   Temperature range °C -35 +120
Brake Fluid -   Alcohols xx   Electr. properties -
Silicone & Grease xx   Ketone -   Compression sets xxx
Gasoline xxx   Acid (concentrated) -   Flame resistance No
Aromatic fluids up to 50 % xx   Acid (diluted) x      
Kerosene xxx            

Key: xxxx very good --> x satisfactory - not suitable.
Storage: protect against UV-light; store in a dry and dark place (all boxes are marked).
Seals in other materials like Viton on request.

 

(H)DPX TUBTARA BLIND RIVET NUT WITH UNDERHEAD SEAL

Information about the non-reactive, peripheral seal, made of flexible organic based material:

Material Polyurethane Reusability yes
Colour blue Bead form concave
Sealing capacity > 150 bar Cure method heat cure
Temperature range -40 +100 °C Waterproof IP67 *
Shore hardness 50/65 A range    

* The seal reassures an IP67 waterproof Tubtara®-sheet assembly if correctly installed (only guaranteed under Dejond test conditions, certificates available)

Storage : min. 4 years shelf-life if stored in dry conditions (room temperature).

Compatibility with other products : resistant to many automotive oils, antifreeze and transmission fluids.

Hole preparation for semi-hex HDKX + Precote® seal

To obtain an IP 67 waterproof assembly with semi-hex (stainless steel) HDKX series, the hexagonal holes need to be formed with a radius: 
 

   

 

CONVERSION TABLE

Multiply by To get
millimeter (mm) .03937 inch (in)
inch (in) 25,4 millimeter (mm)
kilogram (kg) 2,2046 pound (lb)
pound (lb) 0,4536 kilogram (kg)
Newton (N) 0,2248 pound-force (lbf)
Newton metre (Nm) 8,8507 pound-inch (Lb-In)

 

Materials

 

Tubtara® blind rivet nuts are available in steel, aluminium and stainless steel 304 & 316. 

For critical bearing environments, we can also offer the following solutions to cope with most environmental conditions:

  • superior cold-formed stainless steel A5 or A6 quality
  • several finishing options on stainless steel, e.g. Cadmium, ZnNi, Seal Inox®
  • passivated stainless steel

 

Available from stock:

Material     WNr
Aluminium AIMg2.5 5052 3.3523
Steel C8C QST 34-3 1.0213
Stainless steel A2 304Cu   1.4567
Stainless steel A4 316Cu   1.4578

 

Available on request:

Material     WNr
Stainless steel A5 316Ti   1.4571
Stainless steel A6 904L   1.4539
HS (High Strength) steel 23MnB4   1.5535
HS (High Strength) aluminium Almg3,5 5154  

 

HOW TO CHOOSE THE RIGHT MATERIAL?

Choosing the right material and coating for your Tubtara® blind rivet nuts is very important for obtaining optimal functionality during the whole life cycle, especially when environmental conditions are unknown or critical. Influences can be chemical (elements dissolved in water), abrasive (sand), heat, friction, contact with other metals, corrosive environments, etc.

The ideal material choice is not always easy and all conditions should be taken into account. We therefore strongly advise to check the following tables and do some tests in the specific application environment in advance.

Material specifications are always subject to modification.

Samples are available on request.

Coatings

WHY USE A COATING?

We recommend following our Requirements & Solutions Survey and do some tests in the specific application environment in advance. Samples are available on request.

Zinktop 480 H

  • 96 h white rust – 480 h red rust

  • Layer thickness: 10μ ±2μ

  • Colour: light grey

  • High-quality Cr6+ and Ni-free

  • Conforms with ROHS 2, Reach, ELV directives 

  • Corrosion protection: ****

  • Availability: standard from stock

 

Zinc blue / white CR3+

  • 24 h white rust – 72 h red rust

  • Colour: blue/white

  • Cr6+ free

  • RoHS/Reach compliant

  • Corrosion protection: *

  • Availability: on request

Zinc Black Cr3

  • ​48 h white rust – 96 h red rust

  • Colour: black

  • Cr6+-free

  • RoHS/Reach compliant

  • Corrosion protection: *

  • Availability: on request

Zinktop 480 h cobalt-free

  • 96 h white rust – 480 h red rust

  • Colour: light grey

  • Cr6+-, Ni- and Co-free

  • RoHS/Reach compliant

  • Corrosion protection: ****

  • Availability: on request

Ultra 1000

  • 240 h white rust – 1000 h red rust

  • Colour: matt grey

  • Cr6+- and Ni-free

  • RoHS/Reach compliant

  • Corrosion protection: *****

  • Availability: on request

Zinc nickel (Zn Ni)

  • Quality according to customer’s specifications

  • Availability: on request

Vibraseal®

  • Feature: seals, anti-vibration

  • Colour: red, green

  • Availability: on request

Gleitmo®

  • Feature: friction reduction

  • Hexagonal shank recommended

  • Availability: on request

Stainless steel

All stainless steel Tubtara® blind rivet nuts have been treated via a special process to obtain a natural passivation layer, improving corrosion resistance compared to common stainless steel parts on the market.

Optional coatings on stainless steel are:

      • Seal Inox®

      • Gleitmo® 

      • full passivation

Seal inox®

  • Feature: reduces friction and prevents stainless steel galling

  • Hexagonal shank recommended

  • Colour: grey, black, transparent

  • Availability: on request

Full passivation

  • Feature: increased corrosion resistance

  • Availibility: on request

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