4.7mm x 12.5mm Bonded Sealing Washer with EPDM, A2 Stainless Steel | Vital Parts - BSW-47-125-A2-EPDM Our 4.7mm x 12.5mm Bonded Sealing Washer is a high-performance fastening solution, designed for use in industrial and commercial sealing applications. Manufactured with a robust A2 outer ring and a EPDM rubber inner seal, this washer delivers a reliable, leak-resistant seal between fasteners and substrates. With an internal diameter of 4.7mm and an outside diameter of 12.5mm, it’s ideal for use with matching fasteners and is commonly selected for sealing screw or bolt holes in environments where watertight or airtight integrity is critical. What is a Bonded Sealing Washer? Bonded Sealing Washers, also known as seal washers or Dowty washers, consist of a metal ring bonded to a rubber sealing element. The metal ring provides strength and resistance to deformation, while the bonded rubber creates a pressure-tight seal under compression. The EPDM rubber used in this washer offers excellent resistance to weathering, ozone, UV exposure, and a wide range of temperatures and chemicals, making it suitable for demanding environments. Key Applications and Industries This washer is a staple component in the UK’s construction, plumbing, HVAC, and mechanical engineering sectors. Frequently used by builders, plumbers, heating engineers, and maintenance professionals, it serves as a sealing solution around screws or bolts where fluids or gases may escape. Whether sealing roofing fixings, pipe brackets, electrical enclosures or machinery panels, this bonded seal washer ensures long-lasting performance and reduces the risk of leaks or vibration loosening. Construction & Roofing: Used to seal fasteners in metal sheeting, cladding, and flashing installations. HVAC Systems: Provides a secure seal for ductwork and heating units. Plumbing & Mechanical: Ideal for use in pipe connections, flange joints, and pump assemblies. Why Choose Our Bonded Sealing Washers? Vital Parts’ Bonded Sealing Washers stand out for their high-quality materials and precision manufacturing, offering an effective combination of mechanical strength and environmental resistance. They help reduce installation times, prevent over-tightening damage, and improve long-term performance. Our washers are supplied in a range of sizes and materials to suit every job, from general use to highly specialised applications. Key Features: Dual material design: A2 for corrosion resistance, EPDM rubber for effective sealing. Excellent resistance to ozone, UV, and temperature extremes (-40°C to +120°C). Ideal for pressurised or weather-exposed environments. Technical Specifications: Internal Diameter: 4.7mm Outside Diameter: 12.5mm Total Thickness: 2.8mm Metal Thickness: 0.8mm Seal Thickness: 2mm Material: A2 Seal Material: EPDM Who Uses Bonded Seal Washers? Commonly used by UK-based tradespeople, contractors, and engineers, bonded sealing washers are chosen for their dependability and ease of installation. Builders use them to maintain watertight roofing systems, plumbers rely on them for leak-proof pipework installations, and HVAC engineers install them for secure sealing around duct and unit fittings. Their resistance to vibration and wear makes them suitable for long-term industrial use. Order from Vital Parts Today Need help choosing the right bonded sealing washers for your job? Call Vital Parts today to benefit from free product advice, same-day dispatch on most orders, and exclusive trade discounts for UK businesses. As a UK-based supplier of specialist components, we pride ourselves on delivering exceptional customer support and reliable, high-quality products to professionals across the country. Order now or speak to one of our expert advisers to ensure you’re getting the best product for your application.
About Vital Parts:
We are a friendly and innovative Plastic, Rubber & Metal Components company based in Maidstone, Kent. Supplying a wealth of standard and bespoke products for use in a number of Industries from Automotive to Hospitality.
We operate online through our ecommerce store, offering free samples, next day delivery and complimentary 3-4 day delivery on every single order.
Visit us today at https://www.vital-parts.co.uk
Phone:
01233713581
Email:
customerservices@vital-parts.co.uk
Location:
Unit 17 Palace Industrial EstateBircholt Road
Maidstone
ME15 9XU
