Alumina Ceramic Insulating Cap and Bolt Kit for Gas Line and Vacuum Feedthrough (M14 Thread)

Alumina Ceramic Insulating Bolt and Fastening Components

Alumina ceramic insulating bolt, ceramic insulating cap, vacuum feedthrough ceramic, gas line ceramic insulator, and semiconductor insulating fastener are mainly used in semiconductor equipment, vacuum chambers, gas delivery systems, and high-temperature electrical insulation assemblies. These components are designed for positions that require both mechanical fastening and electrical isolation, with relatively high requirements for dimensional accuracy, dielectric performance, thermal stability, and structural reliability.

According to different assembly structures and service conditions, these components are commonly manufactured from high-purity alumina ceramics and can be machined into threaded bolts, insulating caps, sleeves, feedthrough-related ceramic parts, and custom insulating fasteners. They are typically used to support insulation, positioning, fastening, and gas line isolation in semiconductor and vacuum systems.

Typical Product Forms

• Alumina ceramic insulating bolt for electrical isolation and mechanical fastening
• Ceramic insulating cap for insulating bolt heads and exposed conductive positions
• Vacuum feedthrough ceramic for vacuum-related insulation and structural matching
• Gas line ceramic insulator for gas delivery and process line isolation
• Semiconductor insulating fastener for equipment assembly and non-standard insulating structures

Material Features of High-Purity Alumina

• Good dielectric strength for electrical insulation applications
• Good thermal stability for elevated-temperature environments
• High hardness and wear resistance
• Good dimensional stability in vacuum and process equipment
• Suitable for precision grinding and custom machining
• Applicable to semiconductor, vacuum, and gas handling systems

Machining Features of Alumina Ceramic Insulating Bolt

The alumina ceramic insulating bolt usually requires accurate control of thread profile, concentricity, shank dimensions, and mating surfaces. For small threads, long body structures, or parts with local thin-wall areas, machining feasibility should be confirmed based on drawing details, tolerance requirements, and assembly conditions. Proper machining control helps improve fitting consistency and service stability.

Function of the Ceramic Insulating Cap

The ceramic insulating cap is commonly used to isolate bolt heads, fastening points, or electrically sensitive positions from surrounding conductive structures. In semiconductor and vacuum equipment, this type of component can help improve insulation layout and reduce the risk of electrical interference caused by direct conductive exposure.

Vacuum Feedthrough Ceramic and Gas Line Ceramic Insulator Applications

Vacuum feedthrough ceramic and gas line ceramic insulator components are often used in vacuum assemblies, feedthrough-related structures, gas line connections, and high-temperature insulating positions. These parts may involve through holes, fitting diameters, stepped surfaces, sealing-related interfaces, and custom assembly features. Material selection and machining details should be evaluated according to the actual vacuum level, temperature range, gas media, and installation method.

Custom Machining Capability

• Custom sizes and thread specifications are available
• Support for bolts, caps, sleeves, insulating spacers, and custom ceramic parts
• Support for external threads, through holes, counterbores, and stepped structures
• Suitable for semiconductor insulating fastener and vacuum insulation applications
• Machining can be evaluated according to drawings and service conditions

Key Parameters to Confirm

• Thread type, pitch, effective thread length, and tolerance
• Overall length, shank diameter, head size, and wall thickness
• Through-hole diameter, depth, and concentricity requirements
• Mating surface dimensions and fitting structure details
• Working temperature, vacuum level, and process atmosphere
• Gas media, dielectric requirements, and cleanliness requirements

Common Application Scenarios

• Semiconductor chamber insulation assemblies
• Vacuum system fastening and electrical isolation structures
• Gas delivery system insulating connection points
• High-temperature furnace insulating fixtures
• Custom ceramic fastening parts for research equipment

Common Product Names

Depending on the application, drawing habits, and assembly position, these products may be referred to as alumina ceramic insulating bolt, ceramic insulating cap, vacuum feedthrough ceramic, gas line ceramic insulator, or semiconductor insulating fastener. Different names may correspond to different structures, dimensions, and actual service conditions.

Drawing Review Suggestion

For alumina ceramic insulating bolt and related ceramic fastening components, it is recommended to provide complete drawings, thread specifications, key dimensions, tolerance requirements, operating temperature, vacuum level, gas media, and assembly conditions. For vacuum feedthrough ceramic, gas line ceramic insulator, and other critical insulation parts, confirming the material grade, surface condition, and matching structure in advance can help improve assembly compatibility and service reliability.

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Material Reference

Aluminium Oxide (Al2O3) Properties