Ceramic Screws Made from 99.5% High-Purity Alumina (Niimi Sangyo Co.,Ltd)

Features of Ceramic Screws

Excellent Electrical Insulation
Dielectric strength of 10 kV/mm or higher
Outstanding Heat Resistance
Continuous use at temperatures up to 1000°C
Excellent Chemical Resistance
Usable in corrosive environments
Superior Chemical Stability
Minimal release of chemicals
Compliant with RoHS Directive

Primary Applications of Ceramic Screws

Electrical and Electronic Equipment
Used as electrically insulating fixed screws.
Semiconductor and LCD Manufacturing Equipment
Used as non-magnetic, chemically stable, chemical-resistant, heat-resistant, and electrically insulating screws.
Scientific Instruments and Vacuum Equipment
Used as chemical-resistant, heat-resistant, and chemically stable screws.
Medical Devices and Equipment
Used as chemical-resistant, chemically stable, and biocompatible screws.

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Properties of Ceramic Screws

1. Material: 99.5% Alumina （Al₂O₃）
2. Density: 3.9g/cm³
3. Torque (Reference): ・Torsional Breaking Torque: M6.3 N·m
・Recommended Torque is 50% of the specified value.
4. Heat Resistance: 1500°C
5. Dielectric Strength: > 10 kV/mm
6. Volume Resistivity: 20°C > 10 Ω·m
7. Thermal Conductivity: 32 W/m·K at 20°C
8. Coefficient of Thermal Expansion: 7.2 × 10⁻⁶/°C from 40°C to 400°C

The property values are representative and not guaranteed.

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Product Specifications

Hex Bolt	Length Dimension
Size	5	6	8	10	12	16	20	25	30
M3	●	●	●	●
M4	●	●	●	●	●	●	●	●
M5			●	●	●	●	●	●	●
M6				●	●	●	●	●	●
M8					●	●	●	●	●
M10					●	●	●	●	●

Hex Socket Bolt	Length Dimension
Size	5	6	8	10	12	16	20	25	30
M3	●	●	●	●
M4	●	●	●	●	●	●	●	●
M5			●	●	●	●	●	●	●
M6				●	●	●	●	●	●
M8					●	●	●	●	●
M10					●	●	●	●	●

Hex Nut
Size
M3	●
M4	●
M5	●
M6	●
M8	●
M10	●

For Inquiry

We can accommodate sizes other than those listed and also handle custom orders.
If you have any other questions or requests, please feel free to contact us.