Home » Ceramic (Alumina Al2O3) Flat Washers - DIN 125A
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Ceramic (Alumina Al2O3) Flat Washers - DIN 125A

Manufactured to order.
SKU: CERWAM3
€7,02 - €8,77 EUR / each Ex. VAT

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10 pcs €8,33
20 pcs €8,16
30 pcs €7,89
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75 pcs €7,45
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Material: Ceramic

Measurement System: Metric

White/Natural

Ceramic = 1500°C

Flammability = Noncombustible

Ceramic (Alumina Al2O3) Flat Washers - DIN 125A conform to the following Standards/Norms:

ISO 7089

DIN125A

Ceramic (99.5% Alumina Al2O3) flat washers in DIN 125A specification are perfect for extreme applications where exceptional heat resistance, electrical insulation and chemical resistance are required.

Key features of the washers include:

  • Made from 99.5% high-purity alumina.
  • Manufactured to DIN 125A.
  • Continuous use temperature of 1,500°C.
  • Excellent heat resistance, chemical resistance, and electrical insulation.

High Temperature Resistance: They exhibit excellent resistance to high temperatures (up to 1,500°C continuous). This makes our washers suitable for applications in high-temperature environments, such as satellites, vacuum and furnaces.

Exceptional Hardness: Alumina is known for its high hardness, ranking just below diamond on the Mohs scale. Our washers offer exceptional resistance to abrasion, wear, and surface damage. This makes them ideal for applications where components are subjected to friction or abrasive forces.

Corrosion Resistance: Our washers are highly resistant to corrosion and chemical attack. It can withstand exposure to various acids, alkalis, and corrosive substances without degradation. Our washers are commonly used in industries where chemical resistance is essential, such as chemical processing plants, and oil and gas production.

Electrical Insulation: These washer products are an excellent electrical insulator. Our washers do not conduct electricity, making them suitable for applications where electrical insulation is necessary, such as high-voltage equipment.

Lightweight: These washers are lightweight. This property is advantageous in applications where weight reduction is a priority, such as aerospace or automotive industries.

Specialised Applications: Ceramic Alumina washers are designed for usage in a wide range of industries, including aerospace, automotive, electronics, semiconductor manufacturing, chemical processing, and high-temperature equipment. They are commonly used in environments where their unique combination of properties, including high temperature resistance, hardness, corrosion resistance, and electrical insulation, essential.

The Ceramic data sheet is available as a PDF to download below.

Return components within 90 days for a full refund. Please see returns terms and conditions for further information.

Ceramic (Alumina Al2O3) Flat Washers - DIN 125A

Product Drawing

Flat Washer Dimension Table (ISO7089/DIN125A)
M Size Inside Diameter (mm) Outside Diameter (mm) Thickness (mm)
M3 3.2 7.0 0.5
M4 4.3 9.0 0.8
M5 5.3 10.0 1.0
M6 6.4 12.5 1.6
M7 7.4 14.0 1.6
M8 8.4 17.0 1.6
M10 10.5 21.0 2.0
M12 13.0 24.0 2.5
M14 15.0 28.0 2.5
M16 17.0 30.0 3.0
M18 19.0 34.0 3.0
M20 21.0 37.0 3.0

Dimension Table

Dimensions for Ceramic (Alumina Al2O3) Flat Washers - DIN 125A in all available sizes are shown according to the product drawing above.

Key Ceramic (99.5% Alumina Al₂O₃) Properties

Ceramic (Alumina) Hexagon Bolts - High Performance Polymer-Plastic Fastener Components

Ceramic (99.5% Alumina Al₂O₃) Datasheet

Follow the link below to view our Ceramic data sheet. This includes properties such as mechanical, electrical, thermal and chemical resistance.

Download PDF

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Ceramic Key Properties

  • Corrosion Resistance: Provides excellent protection against rust, oxidation, and environmental degradation, making them suitable for use in harsh or corrosive environments.

    Chemical Inertness: It is resistant to most acids, alkalis, and other corrosive substances, ensuring durability in harsh chemical environments.

    Density: The density of 99.5% Alumina is approximately **3.90–3.95 g/cm³**, giving it a robust and dense structure.

    Temperature Stability: Alumina conducts heat effectively compared to other ceramics, though it is lower than metals. Alumina withstands extreme temperatures, with a melting point of approximately 2,050°C.

  • Optical Transparency: Thin sections of high-purity alumina can be optically transparent, which is useful in specific optical and laser applications.

    Electrical Insulation: It is an excellent electrical insulator, even at elevated temperatures.

    Biocompatibility: Alumina is biologically inert and safe for medical applications such as implants and prosthetics.

    Durability: Alumina is one of the hardest ceramic materials, making it highly wear-resistant and suitable for abrasive environments.

  • Low Dielectric Loss: It has a low dielectric loss, making it suitable for high-frequency electrical applications.

    High Dielectric Strength: Provides excellent dielectric strength, supporting applications requiring insulating properties under high voltages.

    Strength: It offers high compressive strength and good flexural strength.

    Low Thermal Expansion: Alumina has relatively low thermal expansion, contributing to dimensional stability under temperature variations.

ISO 9001 Certified

Certified through Quality Veritas. High Performance Polymer conforms to the ISO9001 quality management system. Certificates available on request.

Certificate Of Conformity

Product certificate of conformity available on request, confirming the product manufacturing standard and material.

Material Certificates

Full material traceability and certification confirming the material data and raw material batch number, which can be traced back to the manufacturer. 

Highly Competitive Prices

We offer price matching against all UK distrubutors. All of our products are manufactured to the highest standards and exhibit exceptional characteristics.

Why Choose High Performance Polymer?

  • 50,000+ Fasteners In stock

    No long lead times. We have a large range of PEEK fasteners available for express delivery (Dispatched the same day if ordered before 3PM Monday-Thursday).

    Fasteners not available for express delivery will display the expected delivery date above the 'add to cart' button. 

    Manufacturer Direct Distributor

    We are a manufacturer direct distributor, this allows us to ensure highly competitive prices and keep our shelves stocked. All of our products are manufactured to the highest standards and exhibit exceptional characteristics.

    ISO9001 Certified

    Certified through Quality Veritas. High Performance Polymer conforms to the ISO9001 quality management system. Certificates available on request.

  • Material Certificates

    We provide full material traceability and can provide certification confirming material data and batch number, which can be traced back to the manufacturer. 

    Certificate Of Conformity

    We also provide a certificate of conformity on request, confirming the product manufacturing standard and material.

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