Bonded Seal Washers – Imperial Dowty Washers | BSP Hydraulic Sealing Washers | 1/8" to 1" BSP

🔩 Imperial Bonded Seal Washers – BSP Dowty Sealing Washers

These Imperial Bonded Seal Washers (also known as Dowty washers) are engineered for high-pressure sealing in hydraulic systems, fuel lines, and other industrial applications requiring a reliable seal around BSP-threaded fittings.

Each washer features a metal outer ring and a Nitrile rubber inner seal, forming a tight and leak-proof barrier ideal for use in harsh environments with oil, fuel, water, and hydraulic fluid exposure.

Designed for BSP (British Standard Pipe) threads, these washers ensure a secure fit in critical pressure systems — self-centralising and built for performance.

📏 BSP Sizes Available:

Listed by BSP Size (Thread Equivalent – Outer Diameter – Thickness)

• 1/8" BSP (M10 × 16.0mm × 2.0mm)
• 1/4" BSP (M14 × 21.0mm × 2.0mm)
• 3/8" BSP (M17 × 24.0mm × 2.5mm)
• 1/2" BSP (M22 × 28.0mm × 2.5mm)
• 5/8" BSP (M24 × 32.0mm × 2.5mm)
• 3/4" BSP (M28 × 35.0mm × 2.5mm)
• 1" BSP (M33 × 42.0mm × 2.5mm)

📦 Quantities Available:

10, 25, 50 & 100
Need trade pricing or custom packs? Contact us directly for bulk orders.

✅ Key Features:

• High-Performance Hydraulic Seal: Ideal for hydraulic systems, air compressors, fuel lines, and oil fittings
• Self-Centralising Dowty Design: Simplifies installation and improves seal accuracy
• Nitrile Rubber Inner Ring: Resistant to water, oil, petrol, diesel, and most common fluids
• Excellent Under Pressure: Durable metal outer ring provides structural integrity
• BSP-Specific Sizing: Made to suit British Standard Pipe threads — ensure compatibility with imperial/BSP standards
• Reusable in Some Applications: When not over-torqued, they may be reused

⚙️ Applications:

• Hydraulic equipment & pipe fittings
• Pneumatic systems
• BSP-threaded fuel & oil lines
• Marine, automotive, agricultural, and industrial machinery
• Oil reservoirs, compressors, power packs, and valves
• High-pressure sealing systems

🚚 Shipping & Dispatch:

• FREE UK Delivery via Royal Mail 48

Optional Upgrades:

• Royal Mail 24 – £1
• FedEx Tracked Next Day – £5
• Same Day Dispatch on all orders placed before 1PM (Mon–Fri)
• Tracked & Signed International Shipping
• VAT Invoice Provided with Every Purchase

🧰 Imperial Dowty Washers – Trusted Hydraulic Sealing for BSP Fittings.

Whether you're maintaining a hydraulic system, repairing fuel lines, or installing industrial piping, these bonded seal washers provide the leak-proof confidence you need.