A superb combination of corrosion resistance, temperature stability and non-conductivity

Alumina ceramic hex head cap screws are one of the most thermally resistant screws available. Due to their outstanding thermal resiustance, alumina ceramic hex head cap screws are geared for the most demanding high temperature applications. Alumina ceramic screws also have outstanding corrosion resistance and are highly chemically resistant to acids, solvents, and salts. Additionally, alumina ceramic hex head cap screws find many uses in high voltage applications due to their non-conductive electrical properties.

Alumina ceramic hex head cap screws are available in both metric and standard sizes. Please contact us if you have any questions about the properties or availability of our ceramic hex head cap screws.

hex head cap screws made from customer specified ceramic grades or custom dimensions are available upon request.

Screw TypesFlat Head ScrewsHex Cap ScrewsPan Head ScrewsSet ScrewsSocket Head Cap Screws


Ceramic Alumina Hex Head Cap Screw Features and Benefits

It is important to differentiate between a ceramic alumina hex head cap screw and hex head bolt. Often people assume they are the same, but they are actually very different fasteners in terms of how they are manufactured, as well as from an application perspective. Regardless of your choice, ceramic alumina hex heads offer strong, stable joints because of their large head service.

The Hex Comparison

Hex Head Cap Screw Hex Head Bolts
  • Precise applications where tight tolerances on the body dimensions are required. 
  • Features flat washer facing under the bolt head.
  • Also called a finished hex bolt.
  • Appropriate for when mechanical properties are more important than dimensional tolerances. 
  • Hex bolts have a flat end and lack the washer face under the head.

Ceramic Alumina Hex Head Cap Screw Advantages  

The most important feature of a ceramic alumina hex head cap screws is that it has a larger bearing surface area which provide better clamping pressure than other type of fastener such as a socket head cap screw. Additionally, since debris build up is less of an issue with this style of fastener verses a socket head cap screw, they are ideal of dirty applications where particles could clog up a socket. Though ceramic alumina socket heads are typically used for tight access applications, hex heads can be a better choice when there is only side clearance available for tightening. 

 


Common Ceramic Grades

Alumina 99.8%

Alumina ceramic or Aluminum oxide (Al203) is the most common grade of alumina ceramics and is designated as being 99.8% pure. Alumina is most known for high temperature stability and has a usable temperature limit of 3000°F (1650°C). Alumin has the greatest balance of economy, mechanical and thermal properties.

Various other compositions of alumina ceramic are available upon request.


Alumina and Zirconia Properties

Ceramic Properties


Corrosion Resistance of Common Ceramics

Ceramic Corrosion Data

 

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