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  • 228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10)
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228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10)

16 customer reviews
| 3 answered questions

Price: $6.14 & FREE Shipping on orders over $35. Details
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Specifications for this item
Brand Name Small Parts
Part Number ORS-228-10
Material Type Silicone
Hardness 70A
System of Measurement Inch
Color Red
Cross Section Shape Round
Inside Diameter 2.234  inches
Inside Diameter Tolerance 0.02  inches
Outside Diameter 2.512  inches
Overall Width 0.139  inches
Width Tolerance 0.004  inches
Nominal Inside Diameter 2.234  inches
Nominal Outside Diameter 2-1/2  inches
Nominal Width 0.139  inches
LowerTemperature Range -65  Degrees Fahrenheit
Upper Temperature Range 450  Degrees Fahrenheit
Specification Met AS568A
Durometer 70A
Number of Items 10
Outside Diameter 2-1/2  inches
Size 228
UNSPSC Code 31410000

This silicone O-ring is red in color, round in shape, has a durometer of 7OA, and is designed ... Read full product description



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Product Features

  • Made of silicone for use with a variety of chemicals and fluids
  • Can be used across a wide temperature range from -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C)
  • Round in cross-section to provide a seal between cylindrical overlapping surfaces
  • Durometer (hardness) of 70A for resistance to penetration
  • Meets standards defined by Aerospace Standard AS568A

Product Details

  • Shipping Weight: 1 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B000FMYTD2
  • Item model number: 228
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (16 customer reviews)
  • Amazon Best Sellers Rank: #16,189 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
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Frequently Bought Together

228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10) + 331 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-5/8" OD, 3/16" Width (Pack of 5)
Price for both: $10.81

Buy the selected items together

Product Description

This silicone O-ring is red in color, round in shape, has a durometer of 7OA, and is designed for use in a wide variety of sealing applications.

Silicone is acceptable for temperature applications between -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C). It has good resistance to ozone, weather, detergent, salt water, engine and transmission oil, non-petroleum brake fluid, hydraulic fluids that resist fire, vegetable and animal oils, and high molecular weight chlorinated aromatic hydrocarbons. Silicone is vulnerable to mechanical wear and tear, water and steam over 250 degrees F (121 degrees C), aromatic hydrocarbons (benzene), chlorinated hydrocarbons (trichloroethylene), acids and bases, and hydrocarbon fuels.

O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section and a hole in the center, similar to a doughnut. O-rings are available in a number of sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.

This silicone O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.

This silicone O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

22 of 23 people found the following review helpful By John O'Meara on January 14, 2011
Verified Purchase
I bought these o-rings as a replacement on my Nissan spill proof travel mug. I use this mug all the time. It will keep a cup of freshly made tea or coffee hot for 3-4 hours if left closed, or at the right drinking temperature for a full hour. I tried to find a replacement for the o-ring at the Nissan website but could not. These o-rings are an excellent replacement. The mug closes water tight and works like new. Highly recommended for this application.
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7 of 7 people found the following review helpful By bookfreak on June 1, 2010
Verified Purchase
My husband takes a Thermos travel mug of coffee with him every workday, and the o-ring was very stained. I also figured that eventually it would relax and no longer provide a tight, leakproof fit. I thought finding a replacement would be impossible, but, when it looks impossible . . . try Amazon! Found these, which are the exact size as the original. We're set for a long time, now!
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9 of 10 people found the following review helpful By girl in SF on May 16, 2010
Verified Purchase
I bought these based on the recommendation of a previous reviewer. The seal on my Nissan 14oz Leakproof Insulated Travel Mug broke when I was washing it, and without the seal, it wasn't leakproof. These work great. Thanks, previous reviewer!
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6 of 6 people found the following review helpful By L. Klein on September 11, 2011
Verified Purchase
I lost the original ring to my Nissan Stainless coffee cup, and was looking for a new one on Amazon, when Amazon suggested this o-ring to me. What a good suggestion! Now my old cup has a new lease on life and I can lose the ring like 9 more times before I have to buy a whole new one :)
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6 of 6 people found the following review helpful By Robert C. Goding on December 28, 2012
Verified Purchase
This is a perfect replacement O ring for my Thermos Nissan insulated coffee mug. It fit perfectly and provided a tight seal.
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1 of 1 people found the following review helpful By Rayna on December 6, 2014
Verified Purchase
Other previous reviews regarding how well this gasket works to replace the seal in Nissan (Thermos) stainless steel travel tumbler are correct. I bought a package of 6 gaskets for me and my sister. I have the 14 oz tumbler (JMH400SS4) and my sister has the 18 oz tumbler (#JMH550SS4). Our tumblers do not have the handles but the seal/gasket apparently is the same as other reviewers' travel tumblers (with handles). A note for Thermos/Nissan: You really would have a market for replacement seals if you were interested. Note for Amazon's retailer Small Parts: Thank you so much for having this great fix at a great price!
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Verified Purchase
Appears to be clean and well made. Unfortunately it did not work for my purposes, but thats on me because I was just winging it on the measurements. I am trying to replace the O-Ring on a Smart Planet Eco Travel Mug, and while this will fit on the lid, it is too thick for the lid to seat in the mug.

Again, this is no fault of the product but I include that here for anyone who may be trying to replace the garbage O-Ring on the Eco Travel Mug. I will update if I find one that works.
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Verified Purchase
Worked great on my Nissan Thermos Travel coffee mugs. Now they don't leak and I have a lifetime supply. I wish I could have ordered only 4 though
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