Blind Nut and Blind-Bolt

With some projects, finding a fastener that works with thin or brittle materials can seem impossible. This is where rivet nuts and bolts or studs, which are also known as a blind nuts, blind rivet nuts, or threaded inserts, come in.

The Go-Nuts and Go-Bolt from the GOEBEL range of high quality blind fasteners.

These are manufactured to a high degree of precision and ensure complete reliability when planning your thin sheet processes.

Available in a variety of head and body styles in Steel, Stainless Steel and Aluminium.

Download Blind Rivet Nut Technical Guide

APPLICATIONS

  • Automobile Industry – Bumpers, Safety Belts, Airbags etc.
  • Electronics – Safety Cabinets
  • Food Processing – Ovens, Food counters, Extraction hoods etc.
  • Thermal industry – heating plants, air-conditioning, boilers etc.
  • Office equipment – chairs, desks, copiers etc.
  • Construction – Street Furniture, Signage etc
  • Leisure industry – Yachts, Swimming pools, climbing walls etc.

Available in the following options.

BODY TYPES

  • Open End – For normal applications. Most popular as it is compact, economical and allows flexible selection of screw length.
  • Closed End – For sealed construction. Liquid or Pnuematic sealing.

BODY SHAPES

  • ROUND – The most common shape due to it’s versatility and economical cost.
  • SEMI-HEX – Use in a hexagonal hole. Higher resistance to turning Torque.  Compared to the full hexagonal body, the semi-hexagonal body prevents accidental unscrewing after setting with a spanner (e.g. during regular maintenance).
  • FULL HEX – Requires a hexagonal hole. High Torque resistance and body strength. Resists deformation.

HEAD STYLES

  • FLAT Head [Large Flange or LF] – Versatile head type most commonly used in industry where flush fixing is not required. High push out load capacity. This rivet nut feature offers a large load-bearing surface to both reinforce the hole and keep the rivet nut from being pushed through.
  • COUNTERSUNK [CSK] Head – Requires countersinking of parent material to provide a flush seating. Not suitable when sheet thickness is less.
  • SMALL CSK [Reduced CSK] – Extra-small countersunk heads are an improved alternative to countersunk heads as they do not require the hole to be countersunk. With this feature, you ensure an installation that is nearly or completely flush.

Installation of Blind Nuts

Blind rivet nuts are installed using a special tool with a threaded stud or nose that engages with the internal threads of the rivet nut before pulling upwards, deforming the unthreaded section. This then expands under the reverse side of the material, providing a high strength permanent thread in a thin sheet material.

Ideal setting temperature: -30 to +80°C

Insert removal – Sometimes the insert has to be removed after it is installed for variety of reasons. When removal is required, the best method is to remove the fastener head. This can be accomplished by using an oversized drill bit
and gently drilling into the counterbore until the head is removed. Then the body of the insert can be pushed through the mating material. Using a grinding wheel to carefully remove the head is another option.

OPEN End Blind Nuts – Go to the Page

Round Body Knurled – Go to the Page

Large Flange (Flat Head)

Available in:

  • Aluminium
  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Countersunk head CSK

Available in:

  • Aluminium
  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Aluminium
  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Semi-Hex Body – Go to the Page

Large Flange (Flat Head)

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Full-Hex Body – Go to the Page

Large Flange (Flat Head)

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

CLOSED End Blind Nuts – Go to the page

Round Body Knurled – Go to the Page

Large Flange (Flat Head)

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Countersunk head CSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Semi-Hex Body – Go to the Page

Large Flange (Flat Head)

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Full-Hex Body – Go to the Page

Large Flange (Flat Head)

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Small Countersunk head RCSK

Available in:

  • Steel Zinc Coated
  • Stainless Steel – AISI-304
  • Stainless Steel – AISI-316

Speciality Blind Nuts – Go to the page

NEOPREN Rubber Expansion Nut

For complicated and special situations, the NEOPREN Rubber expansion blind nut offers a unique solution.

Also called Rubber Expansion nuts, or Well nuts, these consist of a flanged neoprene bushing with a threaded nut embedded in the non-flanged end.

Available in EPDM with Brass Insert.

Split Blind Nuts – GO-FOUR and GO-SPLIT

The split blind nut is very useful for installing internal threads in thin sheets and softer materials.

GO-BOLT Blind Bolts or Studs – Go to the page

This variant provides a specialty solution for many situations where the blind nuts are not suitable or feasible.

After riveting, a threaded stud is available for use.

These inserts are useful when used to mount a plate
or cover that can be hung over the studs for ease of assembly

Technical Notes

How to choose the right material ?
Choosing the right material and coating for your  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 do some tests in the specific application environment in advance.

1. Material Combination Guide

The following rule applies in order to avoid contact corrosion:

The connecting parts in a specific application must have at least the same corrosion resistance as the connected components. If this is not possible, the connecting parts must be of higher quality than the components.

Which Blind Nut into which Sheet? The version you choose also depends on the resistance of the blind rivet nut and screw.

XXX – Highly Recommended.   XX – Recommended.     X – Not preferred.    – Not advisable

We strongly advise to do some tests in the specific application environment.

2. Recommended tightening torque values (Nm) to avoid damaging the threaded connection and ensure optimal screw-nut assembly:

Rivet size→ 

Material↓

 M3 M4 M5 M6 M8 M10 M12
Aluminium 1.8 2.0 4.0 9.0 16.0 26.0
Steel 2.2 2.8 5.5 10 22.0 44.0 76.0
Stainless Steel 2.2 2.8 5.5 10 22.0 44.0 76.0

3. Grip Range

The suggested Grip range for each size is provided in the product datasheets.

However, Grip range can be affected by parent material density and actual hole size. We recommend trial installations to determine optimum grip.