Washer PP12 /100pcs/ 650644

Professional steel washer for fire protection systems

The PP12 washer is a specialized mounting component made of electro-galvanized steel, designed for M12 metric bolts. The product meets the E90 fire resistance class requirements according to the DIN 4102-12 standard, ensuring at least 90 minutes of operational integrity of devices within a building.

Construction and materials

The washer is made of high-quality steel with a surface protected by electro-galvanization/electrolytic zinc coating, which guarantees corrosion resistance and long-term operation. The internal diameter of 12 mm fits M12 metric bolts perfectly, ensuring precise fit and mounting stability.

The basic finish is G - electro-galvanized. Other material variants are also available:

• FP - zinc flake coating according to PN-EN ISO 10683:2018-11
• F - hot-dip galvanized steel according to PN-EN ISO 1461:2023-02
• E - stainless steel

Application in safety systems

The product has been specifically designed for connecting fire protection system components, where maintaining functionality for a specified time during a fire is of critical importance. The PP12 washer is used in the installation of:

• Fire detection devices
• Fire alarm systems
• Emergency lighting in buildings equipped with water sprinklers

Compliance and certificates

The washer meets the E90 fire resistance class requirements according to the DIN 4102-12 standard, which means it maintains its mechanical and functional properties for a minimum of 90 minutes of operation under fire conditions. The product dimensions comply with the DIN 125 standard, ensuring compatibility with a wide range of mounting elements available on the market.