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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.
Arizona Shopper
Reviewed in the United States on February 14, 2025
I saw a video from Astronomy Garage with Reflactor which recommended using these O-rings to replace the missing rubber around the Crayford style focuser knobs on a Newtonian telescope (see photo). The focuser knobs without the rubber strip were a little sharp, and they could get quite cold. These O-rings have a nice feel and grip to them - very comfortable.
Stephanie Banning
Reviewed in the United States on October 3, 2024
Haven't had to replace after installation on loader
Woody Cooper
Reviewed in Canada on February 26, 2023
Sized accurately and works as it should
kcwcc
Reviewed in Canada on September 27, 2022
The washers are to size and as described. They stretch and will return to size. The only issue is if they get any small nick they will break so be careful. Don't use a pick to remove them for instance. Other than that they work fine.
Luna
Reviewed in the United States on August 27, 2022
I bought this for a side project to reduce friction on rollers for my laser engraver. It works, can’t say much more!
Donald Kendall
Reviewed in the United States on February 27, 2022
These pringa worked perfect for my application.
Steve in Monterey
Reviewed in the United States on October 7, 2022
One of the filter/pressure reducers in our irrigation system was installed with no gasket. I bought this based on a rough measurement and it works well. I had to stretch it a bit to fit into the groove where it sits, but that's my fault for not measuring exactly. It seal seems perfect, as it should be since o-rings are good for much higher pressures than this.For fun I pulled really hard on one of the extra rings. No cracks, no breakage.
Mobile skii
Reviewed in Canada on June 10, 2021
Good, quality, durable. Worked well in fixing my pump
Darbohm
Reviewed in the United States on November 2, 2019
Great value
Robert
Reviewed in Canada on April 14, 2019
Exact replacement for WEDCO gas tank older version (yellow spout gasket)
The Smiths
Reviewed in the United States on October 10, 2018
I bought these to use on a string of outdoor lights that the original O rings had dry rotted over years of sun exposure. I had a hard time finding the right sized rings and took a shot in the dark on these. A great find as they fit perfectly to keep the plastic housing away from the bulb. Not your regular use but necessity is the Mother and all that.
Melinda
Reviewed in the United States on November 14, 2017
I bought these hoping I could use them inside a bottle cap but they were a little bit too thick. I'm saving them for another use later.
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