Hino Copper Seal Washer S172201010 | Marine Diesel Engine Sealing Washer
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Hino Copper Seal Washer S172201010 — Marine Diesel Engine Sealing Washer
A precision OEM copper seal washer for Hino marine diesel engines. Copper seal washers are used as crush washers on drain plugs, banjo bolts, and fuel or oil system fittings — they deform slightly under torque to create a leak-free metal-to-metal seal without the need for thread sealant or gasket compound.
This is the correct OEM replacement washer for compatible Hino diesel engine applications. Using the correct OEM washer ensures proper crush characteristics and a reliable seal — aftermarket substitutes may not deform correctly and can result in seepage or leaks.
Key Features
- Part number: S172201010
- Material: Copper — soft enough to crush and seal, durable enough to resist corrosion
- OEM Hino specification — correct crush characteristics for a leak-free seal
- Used on drain plugs, banjo bolts, and fuel/oil system fittings
- Single-use — replace with a new washer every time the fitting is removed
Best Use Case
Replace this washer any time the associated drain plug, banjo bolt, or fitting is removed — copper seal washers are single-use components and should never be reused after being torqued. Reusing a crushed washer is a common cause of minor oil or fuel seepage on diesel engines. Always torque the fitting to the specification in your engine’s service manual. Confirm the washer outer diameter, inner diameter, and thickness match your application before ordering.
Parts Desk Insights
Copper seal washers are a low-cost, high-importance consumable — customers doing any oil change, fuel filter service, or banjo bolt work on a Hino diesel should always replace the washer. They’re easy to forget and easy to upsell at the point of sale. When a customer orders oil filters or fuel filters, always ask if they need the seal washers too. Cross-sell with the Hino Oil Filter S156071630, Hino Fuel Filter Element S2340-11133, Hino Oil Filter Element Set S1560-71630, and the Hino Seal Washer S172202015 (alternate size). For thermostat and gasket service, see the Hino Thermostat Gasket S163251280 and Hino Thermostat SZ91046010.
Related Hino Engine Service Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.