Alumina Fasteners
- Custom and standard options available.
- Fast lead times guaranteed.
- High performance at a competitive price.
Alumina Fasteners are precision-engineered ceramic bolts, nuts, and washers made from high-purity Al₂O₃. They provide excellent hardness, corrosion resistance, thermal stability, electrical insulation, and light weight. Ideal for extreme environments like semiconductor, aerospace, and chemical processing where metal fasteners fail.NexusX Advanced Materials, as a premier manufacturer and supplier of high-quality. Alumina (Al2O3) products, focuses on producing high-precision aluminum nitride silicon structural compenents through advanced technologies for diverse application fields.
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Alumina Fasteners Data Sheet
Purity: | 95%, 96%, 99%, 99.5%, 99.7%, 99.95% |
Screw Head Type: | Hex Head, Phillips Round Head, Hex Socket Head, Flat Hex Socket Head, Round Head, Flat Head, etc. |
Color: | White or Ivory |
Density | 3.7-3.98 g/cm3 |
Alumina Fasteners Descriptions
Alumina Fasteners are high-performance ceramic components manufactured from 99.5% or 99.8% high-purity aluminum oxide. Designed to outperform traditional metal fasteners in challenging environments, they are chemically inert, exceptionally hard, and heat-resistant up to 1700°C. These fasteners offer superior corrosion resistance, electrical insulation, and non-magnetic properties. Typical applications include semiconductor tooling, vacuum systems, chemical reactors, furnace fixtures, and medical equipment. Available in custom sizes and thread types.
Alumina Fasteners Specifications
Type of Head | Standard | Length | Material | |
Hexagonal Head Screw | American Metric | 5mm~100mm | 95% Alumina | |
 Phillips Round Head Screw | American Metric | 5mm~100mm | 95% Alumina | |
 Hex Socket Head Cap Screw | American Metric | 5mm~100mm | 95% Alumina | |
 Flat Hex Socket Screw | American Metric | 5mm~100mm | 95% Alumina | |
 Round Head Screw | American Metric | 5mm~100mm | 95% Alumina | |
 Flat Head Screw | American Metric | 5mm~100mm | 95% Alumina | |
Alumina Fasteners Machining Capacity
Dimensional Accuracy: | Up to 0.001 mm |
Surface Roughness: | Ra 0.05-3.2 μm |
Concentricity: | Up to 0.002 mm |
Parallelism: | ≤0.01 mm |
Bore Drilling Accuracy: | Up to 0.01 mm |
Cylindricity: | Up to 0.02 mm |
Threading: | Minimum internal thread M2 |
Surface Treatment: | Firing, glazing, grinding, polishing, metallization, etc. |
Alumina Fasteners Advantages
- High hardness & wear resistance – Long service life under friction or abrasion.
- Corrosion resistant – Inert to most acids, alkalis, and harsh chemicals.
- High-temperature stability – Withstands up to 1700°C.
- Electrical insulation – Ideal for electronic and high-voltage applications.
- Non-magnetic – Suitable for MRI and sensitive equipment.
- Lightweight – Lower density than steel, reducing assembly weight.
- Low thermal expansion – Minimal dimensional change under heat.
- Vacuum compatible – Non-outgassing, safe for UHV chambers.
- No galling – Won’t seize or cold-weld like metal fasteners.
Alumina Fasteners Applications
- Semiconductor Manufacturing
Used in wafer handling, etching, and deposition equipment where high purity, electrical insulation, and corrosion resistance are critical. - Aerospace & Defense
Ideal for components requiring lightweight, high-temperature stability, and non-magnetic properties. - Chemical Processing
Fasteners for pumps, valves, and reactors handling aggressive acids, alkalis, and corrosive fluids. - Medical Devices
Used in MRI machines, surgical instruments, and implants due to non-magnetic and biocompatible characteristics. - High-Temperature Furnaces
Securing heating elements, thermocouples, and insulation layers in kilns and vacuum furnaces. - Vacuum Systems (UHV)
Suitable for particle accelerators, vacuum chambers, and space simulation equipment where outgassing must be avoided. - Electronics & Electrical Insulation
Mounting components in high-voltage systems, RF devices, and power supplies to prevent short circuits. - Automotive & EV
Used in battery systems, sensors, and high-temperature exhaust or braking components.
Alumina Ceramic Machining
Alumina ceramics are produced through methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding techniques. Advanced Ceramic Hub utilizes cutting-edge green and biscuit machining technology to produce more complex components with traditional methods. Our advanced machining center includes drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the manufacture of alumina ceramic components with tight tolerances and high complexity. During the machining process, the following precautions should be observed:
- Shrinkage Control: Alumina ceramics shrink by about 20% during sintering, requiring dimensional adjustments in the green body stage.
- Tolerance Control: Precise tolerances are unachievable in the green or pre-sintered state; fine machining should follow sintering.
- Diamond Grinding: Post-sintering, high-hardness alumina requires diamond grinding, as conventional methods fall short.
- Tool Selection: Diamond-coated tools or grinding wheels are essential to handle ceramic hardness and prevent tool damage.
- Temperature Control: Strict temperature management during sintering prevents cracking or deformation.
- Stress Management: Excessive stress during machining must be avoided to prevent brittle failure.
- Cutting Speed and Feed Rate: Controlled speeds and feeds ensure quality and extend tool life.
- Surface Treatment: Post-machining polishing removes defects, enhancing performance and appearance.
Alumina Ceramic Packaging
The Alumina Ceramic products are carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.
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- SAFETY DATA SHEET (SDS) -Alumina Fasteners
FAQ
What are Alumina Fasteners?
Alumina Fasteners are ceramic bolts, nuts, and washers made from high-purity aluminum oxide, offering high temperature resistance, corrosion resistance, and electrical insulation.
What are the main advantages of Alumina Fasteners?
Key advantages include high hardness, wear and corrosion resistance, thermal stability up to 1700°C, electrical insulation, non-magnetic properties, lightweight, vacuum compatibility, and no galling or cold welding.
Where are Alumina Fasteners commonly used?
They are widely used in semiconductor manufacturing, aerospace, chemical processing, medical devices (e.g., MRI), high-temperature furnaces, vacuum systems, electronics, automotive, and lab instruments.
Can Alumina Fasteners replace metal fasteners?
Yes, in high-temperature, corrosive, insulating, or non-magnetic environments. However, they are not recommended for high-impact or high-tensile-load applications.
Are Alumina Fasteners magnetic?
They are completely non-magnetic, ideal for MRI machines, electron beam systems, and other magnetic-sensitive applications.
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