
Bonded Washers
Rubber-bonded metal washers (Dowty seals) for hydraulic fittings.
A leak here usually means downtime, contaminated oil and a failed bearing. Tell us the shaft / bore size, speed, medium and temperature — we will match the profile and compound rather than quote from a generic table.
Technical specifications
Typical ranges for this family — not a test report for a specific part number. Confirm exact dimensions, compound and certification before ordering.
- Product typeBonded washers / Dowty seals — metal ring with a bonded rubber sealing lip
- SizeTo fit metric / BSP / UNF thread sizes — send your size list
- Typical compoundsNBR / FKM bonded to carbon steel or stainless steel
- TemperatureNBR -30~+120°C · FKM -20~+250°C
- ApplicationHydraulic fittings, banjo bolts, pipe connections, high-pressure joints
- CustomisationSpecial dimensions, metal grade and compound on request
- MOQ & lead timeConfirm on WhatsApp
Model numbers for this family
For this family we quote to drawing or sample. Send the part number, dimensions (ID × OD × width) and quantity on WhatsApp and we will confirm the specification.
Three things we need to quote
- Dimensions — d × D × W, or a drawing / sample
- Duty — medium, temperature, pressure or shaft speed
- Quantity — target order quantity and delivery destination
Product photos (3 images)
All from your original photos, converted to WebP. Desktop source files were not modified.



Where this family is used
Automotive & Transmissions
Wheel hubs, crankshafts, gearboxes and differentials — where heat, oil and shaft runout destroy a cheap seal long before the service interval.
Hydraulics & Pneumatics
Cylinders, valves and fittings that leak under pressure pulses. Correct lip geometry and compound matter more than catalogue price.
Pumps, Gearboxes & Motors
Unplanned downtime costs far more than the seal. We size by shaft diameter, speed and medium, not by a generic part number.
Agriculture & Construction
Mud, dust and shock loads demand double-lip or cassette solutions with the right hardness and abrasion resistance.
Related families
Ask about Bonded Washers
The button opens WhatsApp with this product family already written into the message. Add your size and quantity, then press send.