- Made of polytetrafluoroethylene (PTFE) for use with a variety of chemicals, fluids, and gases
- Round in shape to provide a seal between cylindrical overlapping surfaces
- Can be used across a wide temperature range from -328 degrees F (-200 degrees C) to 500 degrees F (260 degrees C)
- Durometer (hardness) of 55D for resistance to penetration
- Meets standards defined by Aerospace Standard AS568A
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PTFE O-Ring, 55D Durometer, Round, White
|Price:||$2.20 - $70.68|
|Brand Name||Small Parts|
|Material Type||PTFE (Polytetrafluoroethylene)|
|Hardness||55 D Durometer|
|System of Measurement||Inch|
|Cross Section Shape||Round|
|LowerTemperature Range||-328 Degrees Fahrenheit|
|Upper Temperature Range||500 Degrees Fahrenheit|
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This PTFE O-ring is white in color, has a durometer of 55D, a round cross-section, and is designed for use in a wide variety of sealing applications.
PTFE has excellent heat, fuel, and chemical resistance and is acceptable for temperature applications between -328 degrees F (-200 degrees C) to 500 degrees F (260 degrees C). It can be used outdoors, with lubricants, hydrocarbons, acids, alkalis, detergents, alcohol, ketones, steam and refrigerants, and also has good electrical resistance. PTFE is vulnerable to high vacuum seals, low compression vacuum sealing flanges, and super-heated steam.
This PTFE O-ring has a shore durometer of 55D. 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.
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 various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.
This PTFE O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
Top Customer Reviews
I needed to make a special replacement ring for my Thrustmaster Warthog Joystick. The stick came with a rubber gasket that was glued in place and then greased.
But the rubber broke loose from its glued position and was pinched and cut. The design really calls for a PTFE material gasket and though these PTFE rings have the right ID and OD dimensions, the profile diameter/thickness was twice what I needed. The plan was to buy the rings and shave down the diameter a little from both sides ending up with a flat profile thickness.
That would've been a piece of cake if I still had access to a vertical mill, (some may have used a lathe and machined arbor jig but IMPO, I saw less work if I held these down while machining them in any number of various milling setup possibilities.
But I didn't have a vertical mill, (or lathe for that matter), nor access to one and the way I did the job was to use a belt sand, (quick, rough material removal stage), followed by an orbital sander, (200-400 grit paper), and then bring it in to the final size with a sanding block by hand.
When I was done, I was looking for a PTFE flat washer/gasket with a thickness of .090. but the tolerance of that thickness had to be within .002 of its thickest point to its thinnest, (in other words, .090 +/.001). The .090 could be .095 but again, no more than a .002 spread from max to min.
That took some indicator blue and about 2 hours, (no mill, remember?Read more ›
These o-rings feel very hard, even though they say 55 durometer. They do not stretch much, so don't think of these as a replacement for any normal buna-n or viton o-ring. If you need stretch, stick with viton, buna-n, or silicone. These work great, if used properly. Don't expect a white version of a "normal" o-ring.
Thanks Amazon for the quick shipping of an odd product that is not stocked in local stores.
Most Recent Customer Reviews
Too hard. I wanted 55A durometer but I didn't notice the D. Maybe make that more evident.Published 17 months ago by Wink
The o-rings were rigid and not flexible at all. I ordered silicone o-rings to replace o-rings in a water heater and these would not work.Published on March 16, 2014 by leland-ar