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What exactly is rivet/blind rivet technology?

GESIPA® makes it clear

Solid and semi-tubular rivets

Alongside the standard blind rivet technology options, GESIPA® also develops and produces solid and semi-tubular rivets within its Solid Riveting business division. From a technological and financial point of view, these joining elements provide an alternative to screw connections and other joining systems accessible from two sides.

Different dimensions, materials and designs cover a wide range of applications. Solid and semi-tubular components are manufactured to suit customer-specific requirements. These components are used within the automotive sector and also have more general industrial applications.

Solid rivets

Solid rivets are a very old joining technology, designed to allow components to be connected in a high-strength, form-fitting, non-detachable manner.

Manufacturing process:

Solid rivets are produced using cold forming at GESIPA's site in Olpe.

Riveting process:

The solid rivets are created in a plastic deformation process by means of a tool (holder and counter-holder) and the application of force. A tight fit is achieved as part of the forming process, thereby filling the hole area.


Solid rivets are generally used in steel, crane, bridge and container construction applications but they are also deployed within the automotive sector for bodywork and frame construction.

Key features and benefits of solid and semi-tubular rivets

GESIPA® develops tailor-made solutions based on application-specific consultations parallely conducting  in- house  testing. Solid rivets are fully definable so that they can be adapted to any specific example through shear strength, tensile strength or clamping force and corrosion protection even once set.

  • Significantly reduced overall costs compared to joining systems accessible from two sides, such as screw connections and lockbolts
  • High tensile and shear strengths
  • No relative movements thanks to optimal bearing stress properties – ideal, for example, for truck and trailer construction
  • Permanent connection
  • High endurance strength
  • High corrosion protection after riveting thanks to the internal SheraBlack® thermodiffusion process and the finish developed in-house

Semi-tubular rivets

Semi-tubular rivets are a classic one-piece joining element for two-sided processing. The difference between these and solid rivets is the axial hole. The shank is partly solid, partly hollow.

Manufacturing process:

Just like their solid counterparts, semi-tubular rivets are also produced in a cold deformation process.

Riveting process:

The connection is established by means of axial pressure on the end of the shank. The semi-tubular rivets are spread by a mandrel or beaded at the open end instead of being formed into a head.


Possible application areas for semi-tubular rivets primarily include surface riveting in clutch and brake-pad construction, or even as axles for wheels, rollers and joints.

Corrosion protection – influence of the setting process

The setting process can result in mechanical damage to the corrosion protection. High deformations or geometric changes can lead to a reduction in the coating thickness. GESIPA® Olpe has developed the SheraBlack® finish with the in-house process and thermodiffusion system. This is part of the setting process and has been designed with corrosion requirements in mind.

Standardsherard and SheraBlack®

SheraBlack® is a corrosion protection process developed by GESIPA®. In a thermodiffusion galvanisation process, a corrosion-resistant iron-zinc alloy coating is applied amongst other things and is suitable for all grades of cast iron and steel. This process allows us to offer our customers the level of protection they need.