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30-Piece NBR O-Ring Set for Karcher K2-K7
$1.89$4.23Save 55%
In stock at aliexpress.com
A 30-piece pack of NBR rubber O-rings sold as replacement seals for Karcher K2 through K7 pressure washers, covering the lance, hose, nozzle and brush connections. At $1.89 it has over 2,100 orders and 97.9% positive feedback on AliExpress, and looks like a second listing of a very similar set.
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Price from AliExpress at our last check (refreshed weekly). The final price, shipping and any import charges show at AliExpress checkout. We may earn a commission if you buy.
Highlights
- 30 NBR O-rings
- Listed for Karcher K2 to K7 washers
- Fits connectors such as lance, hose and nozzle, per the title
- References part number 2.640-729.0
Best for
Owners of a K-series pressure washer chasing a small leak at a spray gun or hose connection.
Things to consider
- It is a compatible aftermarket set, not official Karcher parts
- O-ring sizes vary inside the set, so match them to the groove you are repairing
- Seals ship in a small bag within the usual window; a wrong-size assortment can be reported through AliExpress
Key specs
| Price | $1.89 |
|---|---|
| Quantity | 30 pieces |
| Material | NBR rubber |
| Part reference | 2.640-729.0 (per title) |
Our take
A low-cost repair kit that is worth keeping around. Match sizes against your old seals.
30-Piece NBR O-Ring Set for Karcher K2-K7 at a glance
| Brand | AliExpress |
|---|---|
| Price | $1.89 (was $4.23) |
| Type | Garden Tools |
| Availability | In stock at aliexpress.com |
| Returns | Eligible items can be returned within 90 days of payment, with the first return on each… |
Price check
At $1.89, the 30-Piece NBR O-Ring Set is one of AliExpress's more affordable items, whose 51,717 listed products run $1 to $1,229.
It's currently 55% below its listed price of $4.23. Sale prices can end without notice, so check the live price before you order.
Similar items from other brands we track run $32 to $110.
Frequently asked questions
Will these fix my leaking pressure washer?
If the leak is at a hose or lance connector, a worn O-ring is a common cause. Replace the old ring, lightly lube the new one, and check the fitting for cracks.
Are they official Karcher O-rings?
No, they are aftermarket and reference the Karcher part number. They cost far less than OEM, but fit can vary slightly.
What lubricant should I use?
Use silicone grease on the new O-ring before you seat it. Petroleum-based grease can swell nitrile rubber over time, which would bring the leak back.
How long does delivery to the US take?
A bag of 30 rubber rings is easy to post, so one to three weeks is typical, and Choice or US-warehouse listings are quicker. Tracking is in your order page, and a missing or wrong assortment can be sent to Buyer Protection. Import fees, if any, are shown at checkout.
Is the 30-Piece NBR O-Ring Set on sale?
Yes. AliExpress lists it at $1.89, down from $4.23 (55% off). Sale prices change, so confirm the live price on aliexpress.com.
Is there a discount on the 30-Piece NBR O-Ring Set?
AliExpress publishes these ways to save: Coins in the app. AliExpress sets the terms, which can change; our AliExpress coupons page has the details.
What is AliExpress's return policy?
Eligible items can be returned within 90 days of payment, with the first return on each order free, according to AliExpress's 2024 US announcement. Return terms vary by seller and item, so check the product page. Custom, perishable and hygiene items are generally excluded.
How long does AliExpress take to ship?
AliExpress's 2024 US guarantee listed Choice orders at 5 to 12 days and standard orders at 8 to 14 days, but real-world standard shipping from China often runs longer. Items marked Ship from United States come from local stock. Free shipping on Choice orders depends on a minimum order shown at checkout.
Does the 30-Piece NBR O-Ring Set come with a warranty?
AliExpress's published warranty terms: AliExpress does not publish a marketplace-wide product warranty. Coverage depends on the individual seller, and Buyer Protection covers non-delivery, damage and not-as-described claims instead.
Where can I buy the 30-Piece NBR O-Ring Set?
The 30-Piece NBR O-Ring Set is sold directly by AliExpress on aliexpress.com. The Shop now button on this page goes straight to the product there.
Is the 30-Piece NBR O-Ring Set in stock?
Yes. AliExpress lists it as in stock on aliexpress.com as of our latest check. Stock and prices refresh throughout the day.
Is AliExpress a legit store?
AliExpress is a legitimate marketplace that is worth using for cheap, low-risk things like cables, tools, cleaning supplies and small home items, as long as you can wait and you buy from well-rated sellers. Skip it for anything safety-critical, brand-name or urgent. Check the seller's feedback score, the delivery estimate and the import-charge line at checkout before you pay. Our full AliExpress review covers shipping, returns and what to check before ordering.
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