Alumina Fasteners
Alumina Fasteners
Purity: 95%, 96%, 99%, 99.5%, 99.7%, 99.95%
Alumina Fasteners are primarily made of high-purity aluminum oxide (Al2O3) through high-temperature sintering. They have excellent wear resistance, high-temperature stability, high hardness, and corrosion resistance. We can offer the standard types (e.g., flat head, hex head, pan head, hex socket, etc.). As a leading supplier and manufacturer of premium alumina products, we can supply high-quality alumina fasteners with various specifications and competitive prices, offering customized solutions to meet specific requirements.
Or email us at sales@heegermaterials.com.Alumina Fasteners Data Sheet
| Reference Code: | HM1984 |
| 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
Alumina Fasteners are made primarily from high-purity aluminum oxide with rare additives, sintered at a high temperature of 1700℃ to get the completely dense product. They have excellent wear resistance, high-temperature stability, chemical stability, and high hardness. They are commonly applied in large equipment parts, precision machinery parts, and semiconductor equipment, etc. We can offer high-precision standard screws with matching washers and nuts. Advanced Ceramics Hub can also supply customized solutions to meet diverse industrial and research requirements.
Alumina Fasteners Specifications
| Type of Head | Standard | Length | Material |
 Hexagonal Head Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% Alumina |
 Phillips Round Head Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% Alumina |
 Hex Socket Head Cap Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% Alumina |
 Flat Hex Socket Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% Alumina |
 Round Head Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% Alumina |
 Flat Head Screw | American Metric | 5mm~100mm | 95% Alumina 99.8% 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
- Good stability at high temperatures
- High hardness
- High corrosion resistance
- Good insulation
- Long service life
Alumina Fasteners Applications
- Electronics Industry: Alumina fasteners can be employed as insulating bolts or nuts to secure electronic components in high-temperature or high-voltage environments.
- Aerospace: Alumina fasteners can be used for structural fastening in high-temperature, high-pressure settings, such as engines or thermal insulation parts.
- Chemical Equipment: Alumina fasteners can serve as corrosion-resistant fasteners for securing pipelines or containers, resisting acid and alkali erosion.
- High-Temperature Furnaces: Alumina fasteners can be applied as heat-resistant connectors in kilns or heat treatment equipment.
Alumina Material Properties
Alumina Material Grades
It has a very high purity (99.95%) grade of Alumina (Aluminum Oxide) exhibiting an exceptional combination of mechanical and electrical properties. It features very high hardness, exceptional electrical resistivity, high-temperature mechanical stability and strength in addition to corrosion resistance and bio/chemical inertness.
Its high-temperature stability and electrical stability make it particularly suitable for high-temperature applications such as high voltage/frequency insulators, heating elements supports, etc
Physical Properties:
- Color: White
- Density: 3.98 g/cm3
Applications:
- High-temperature electrical insulators
- Very high voltage/frequency insulators
- Machine components where high wear resistance
is required in an oxidizing environment - Precision shafts in high-wear condition
- Unlubricated (vacuum) or gas/water lubricated
high speed sliding bearings - Shot blast nozzles
- Abrasive flow deflector plates/cones
- Valve seats
- Wire guides
It’s a high-purity grade of Alumina (Aluminum Oxide) and one of the high-performance grades in this range of materials. It features a 99.7% purity Alumina base material that provides a superior set of mechanical and electrical properties while maintaining a reasonable cost. It is a very hard-wearing technical ceramic offering and is ideally suited to a wide range of industrial applications where mechanical and electrical performance is of the essence and the material needs to perform adequately in aggressive environments.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.
Physical Properties:
- Color: Ivory
- Density: 3.9 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
99.5% Purity Alumina is a high-performance engineering material with exceptional mechanical strength, high-temperature resistance, and excellent electrical insulation properties. It is widely used in industrial equipment, electronic components, medical devices, and aerospace applications.
Physical Properties:
- Color: Ivory
- Density: 3.9 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
99% Purity Alumina Is a premium industrial ceramic material with excellent mechanical properties, ultra-high hardness, high-temperature resistance, and insulation performance. It can maintain stable chemical and physical properties even in extreme environments, making it widely used in semiconductors, electronic components, laser technology, and aerospace.
Physical Properties:
- Color: Ivory
- Density: 3.85 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
It is a regular purity grade Alumina (Aluminum Oxide) and it is one of the workhorses of the technical ceramics industry. It features a 96% purity Alumina base material providing a balanced “cost to quality” ratio. It is a hard-wearing technical ceramic offering an excellent combination of both mechanical and electrical properties and is ideally suited to a wide range of industrial applications where cost is of the essence, but the material still needs to perform adequately from a mechanical and electrical standpoint.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.
Physical Properties:
- Color: White
- Density: 3.75 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
95% Purity Alumina is an economical and practical engineering material. Its slightly lower alumina content reduces production costs while maintaining decent wear resistance and processing flexibility. It is commonly used in mechanical parts, electrical insulators, and wear-resistant bushings, offering an excellent cost-performance balance.
Physical Properties:
- Color: White
- Density: 3.7 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
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
Alumina Ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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