OR-MBS - METRIC BONDED SEAL/DOWTY WASHER

$1.54

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📏 Find Your Thread Size

Not sure if it’s BSPP, JIC, or NPT? We’ve got you covered.

Whether you're matching a 3" BSP Brass Ball Valve or identifying a hydraulic hose fitting, our thread chart makes the guesswork easy. Just grab a set of calipers (or even a tape measure), compare your fitting against our chart, and in most cases — boom — you’ll know exactly what thread you’ve got.

Still unsure? No worries. Snap a photo or two, send us the measurements, and we’ll help you confirm the thread so you can order with confidence.

💪 Built to Last Promise

Products we trust. Quality you can count on.

Every hose, fitting, clamp, valve and accessory we supply is carefully selected, used in our own workshop, and backed by our reputation for reliability. We don’t sell anything we wouldn’t use ourselves.

✔️ We crimp every hose assembly in-house for full quality control
✔️ We source only from trusted brands we’d stake our name on
✔️ We offer a no-fuss 2-year warranty on our hose assemblies
✔️ Most fittings, clamps and accessories carry manufacturer warranties from 12 months up to 10 years

Whether it’s under pressure or in harsh environments, our gear is built to last — and delivered fast.

🚚 Fast, Flexible Shipping

Australia-wide delivery with options to suit your jobsite and your deadline.

Whether it’s a single hose or a pallet of fittings, we’ll get it to you fast — with flexible options for critical and non-critical needs.

✔️ We ship Australia-wide — satchels, cartons & pallets
✔️ Delivery typically takes 1–10 business days, depending on your location
✔️ Urgent order? Priority freight options available at checkout
✔️ Some items may ship direct from our supply partners to speed up delivery
✔️ Tracking details provided once your order is dispatched

Need it fast or want to organise your own freight? Let us know — we’re here to help.

Description

METRIC BONDED SEAL DOWTY WASHER FOR METRIC THREADS

Steel washer with vulcanised rubber insert for sealing metric threaded ports
Also known as Dowty Washers or BS Rings
Designed to seal under the head of a fitting against a flat faced port
Ideal for hydraulic systems using DIN Metric threads (DKL, DKS, Komatsu etc.)
Compatible with ISO 6149, DIN 3852, and similar metric ports

COMMON APPLICATIONS:

Used with banjo bolts, tube nuts, adaptors and plug fittings
Sealing high-pressure systems on European and Japanese equipment
Hydraulic cylinders, valve blocks, pumps and manifolds
Field replacements during hose repair and port resealing

COMMONLY FOUND ON (AND MORE):

Metric Thread Systems

Brands: Komatsu, Volvo CE, Fendt, Claas, Hitachi, CNH, Kubota and more
Use: Forms a reliable static seal under the fitting against machined port face

Need help identifying the correct size or material for your bonded seal? Contact our team for expert advice or to request a size chart or metric seal kit.

BUILT TO LAST, DELIVERED FAST.

Payment & Security

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A friend suggested to use TASMANIAN HOSE SOLUTIONS, we have found the service exceptional the pricing even better and the knowledge of products. Scott goes out of his way to make sure you get what you need, if he doesn't stock it its usually one day and its arrived.

Colebrook Sandstone

Your life won’t be fulfilled till you have dealt with Tasmanian Hose Solutions. I never have to hold leaks with my thumbs again. I can just use the parts provided and it’s perfect.

Miro Jurcevic

Most impressed by the quick turnaround and quality of parts ordered. Will definitely use again.

Robert Legg-Bagg

Hoses made while you wait. Great service.

Paul Fergusson

Exactly what i wanted and sent super-fast... exactly how online shopping should be.

Nick Gallegos