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Alumina Fasteners

Alumina Fasteners

Alumina fasteners are specialized components made of alumina ceramic material, also known as aluminum oxide (Al2O3), that are used to secure and connect components in various industrial applications. Alumina is a highly durable and heat-resistant material that is widely used in various industrial applications, such as electrical insulation, refractory lining, and high-temperature processing.

Alumina fasteners are typically produced through a process of shaping and sintering of alumina powder, resulting in a dense and uniform ceramic structure. They can vary in size, shape, and surface finish depending on the intended use and application.

Alumina fasteners have excellent mechanical and electrical properties, including high strength, hardness, and thermal conductivity. They are also resistant to chemical corrosion, making them suitable for use in harsh and corrosive environments.

Alumina fasteners are commonly used in high-temperature and high-wear applications, such as in furnace and kiln components, as well as in aerospace and automotive industries. They can be used as bolts, screws, nuts, washers, and other types of fasteners to secure and connect components.

Alumina fasteners can also be used in electrical and electronic applications, such as in connectors and switches. They provide reliable electrical insulation and thermal conductivity, while being resistant to arcing and corrosion.

Overall, alumina fasteners are a reliable and versatile material that offer excellent performance and longevity in a variety of industrial and electrical applications. They provide exceptional properties and durability in high-temperature and high-wear environments, while maintaining dimensional stability and wear resistance over time.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality Alumina Fasteners with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.




Alumina Fastener Specifications 

Composition AL97 AL98
AL2O3 Content 97% 99.80%
Color White Ivory
Tensile 30 Kpsi 32 Kpsi
Flexural 55 Kpsi 60 Kpsi
Compressive 300 Kpsi 330 Kpsi
Density 3.7 g/cc 3.92 g/cc
Hardness 13.8 HV, Gpa 18 HV, Gpa
Thermal Conductivity 25 W/(m K) 32 W/(m K)
C.O.T.E. 77 In / In°C (x10^7) 78 In / In°C (x10^7)
Working Temperature 1500 °C 1750 °C
Dielectric Constant 9.5 9.8
Volume Resistivity >10^14 Ohm-cm >10^15 Ohm-cm
Dielectric Strength 16 KV/mm 20 KV/mm


*This chart just demonstrates the typical properties of common alumina materials we use to produce our alumina ceramic parts. Please notice that the property for customized alumina parts could vary due to different process. CG Material is a ceramic manufacturer base in the state of California, we could provide aluminum oxide products produced under your specified instruction or do the best to meet customers’ requirements.

Alumina Fastener Applications

Alumina ceramic fasteners can be used in the following applications.
• Used for making parts for CVD, ion implants, photolithography, and semiconductor parts.
• In traditional industries, alumina ceramics are ideal for products such as injector tubes, gas nozzles and insulators.
• Used as a material for industrial furnaces due to its ability to maintain its hardness at high temperatures.
• Used as protector for high temperature thermal couples.
• Used as a material for chemical industry due to its high corrosion resistance.


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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