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PTFE O-Ring, 55D Durometer, Round, White

Available in multiple versions

3.9 out of 5 stars 13 customer reviews

Price: $2.08 - $59.62
Product Specifications
Brand Name Small Parts
Material Type PTFE (Polytetrafluoroethylene)
Hardness 55 D Durometer
System of Measurement Inch
Color White
Cross Section Shape Round
LowerTemperature Range -328  Degrees Fahrenheit
Upper Temperature Range 500  Degrees Fahrenheit
Specification Met AS568A
UNSPSC Code 31410000

This PTFE O-ring is white in color, has a durometer of 55D, a round cross-section, and is desi... See more product details


Currently showing 1-20 of 240 Next »
Size Nominal Inside Diameter Nominal Outside Diameter Nominal Width Inside Diameter Outside Diameter Overall Width Number of Items Part Number
The Amazon Standard Item Number (ASIN) uniquely identifies the item in the Amazon catalog.
Price Quantity
   
003 0.056 inches 3/16 inches 0.06 inches 0.056 inches 3/16 inches 0.06 inches 10 B000FMYEOG
$5.18
004 0.07 inches 13/64 inches 0.07 inches 0.07 inches 13/64 inches 0.07 inches 10 B000FMWBW8
$7.81
006 0.114 inches 1/4 inches 0.07 inches 0.114 inches 1/4 inches 0.07 inches 10 B000FMYPUY
$9.32
006 0.114 inches 1/4 inches 0.07 inches 0.114 inches 1/4 inches 0.07 inches 50 B005HL5T0I
$20.80
007 0.145 inches 9/32 inches 0.07 inches 0.145 inches 9/32 inches 0.07 inches 10 B000FMWN8U
$9.05
007 0.145 inches 9/32 inches 0.07 inches 0.145 inches 9/32 inches 0.07 inches 50 B005HL5VFQ
$20.80
008 0.176 inches 5/16 inches 0.07 inches 0.176 inches 5/16 inches 0.07 inches 10 B000FMWNBM
$6.67
008 0.176 inches 5/16 inches 0.07 inches 0.176 inches 5/16 inches 0.07 inches 50 B005HL5WQO
$21.18
009 0.208 inches 11/32 inches 0.07 inches 0.208 inches 11/32 inches 0.07 inches 10 B000FMYQ4E
$8.62
009 0.208 inches 11/32 inches 0.07 inches 0.208 inches 11/32 inches 0.07 inches 50 B005HL5YEO
$21.48
010 0.239 inches 3/8 inches 0.07 inches 0.239 inches 3/8 inches 0.07 inches 10 B000FMYQ6W
$9.28
010 0.239 inches 3/8 inches 0.07 inches 0.239 inches 3/8 inches 0.07 inches 50 B005HL63BM
$21.57
011 0.301 inches 7/16 inches 0.07 inches 0.301 inches 7/16 inches 0.07 inches 10 B000FMUTO0
$8.10
011 0.301 inches 7/16 inches 0.07 inches 0.301 inches 7/16 inches 0.07 inches 50 B005HL6B78
$22.15
012 0.364 inches 1/2 inches 0.07 inches 0.364 inches 1/2 inches 0.07 inches 10 B000FMUTP4
$8.38
012 0.364 inches 1/2 inches 0.07 inches 0.364 inches 1/2 inches 0.07 inches 50 B005HL6DYO
$22.45
013 0.426 inches 9/16 inches 0.07 inches 0.426 inches 9/16 inches 0.07 inches 10 B000FMUTTK
$3.48
013 0.426 inches 9/16 inches 0.07 inches 0.426 inches 9/16 inches 0.07 inches 50 B005HL6G50
$22.61
014 0.489 inches 5/8 inches 0.07 inches 0.489 inches 5/8 inches 0.07 inches 10 B000FMUTVS
$3.56
014 0.489 inches 5/8 inches 0.07 inches 0.489 inches 5/8 inches 0.07 inches 50 B005HL6INU
$22.52
Currently showing 1-20 of 240 Next »
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Product Features

  • 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

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003SLE5M2
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (13 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

Product Description

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.

Customer Reviews

Top Customer Reviews

Size: 330Nominal Width: 0.21Overall Width: 0.21Outside Diameter: 2-1/2Inside Diameter: 2.1Nominal Inside Diameter: 2.1Number of Items: 5Nominal Outside Diameter: 2-1/2 Verified Purchase
PTFE Rings, (Teflon), are not soft and 'rubbery' (for those who were disappointed about that when they got theirs). They're not supposed to be and as a 23+ year veteran machinist, I can assure you that they're not going to "soften up" until they start wearing out are subjected to heat beyond the max specs of the grade.
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?
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Size: 214Nominal Width: 0.139Overall Width: 0.139Outside Diameter: 1-1/4Inside Diameter: 0.984Nominal Inside Diameter: 0.984Number of Items: 10Nominal Outside Diameter: 1-1/4 Verified Purchase
this is quite hard material, very strong, after a little warming with heat gun it slipped right over pin if pump i was repairing. Doubht this will ever fail again!
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Size: 234Nominal Width: 0.139Overall Width: 0.139Outside Diameter: 3-1/4Inside Diameter: 2.984Nominal Inside Diameter: 2.984Number of Items: 25Nominal Outside Diameter: 3-1/4 Verified Purchase
The item was to my satisfaction, quick service (got it within 5 days) and safely packed. I would highly recommend it to anyone interested in this kind of product.
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Verified Purchase
I can't stand reviews for products that rag on how many you needed to buy, or how much they cost. These are all things you know before you buy, if you don't like it, don't buy it. Now on to the product review.

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.
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Size: 018Nominal Width: 0.07Overall Width: 0.07Outside Diameter: 7/8Inside Diameter: 0.739Nominal Inside Diameter: 0.739Number of Items: 10Nominal Outside Diameter: 7/8 Verified Purchase
I used these on old-fashioned (1920's era) shower faucets, the type that stick out of the wall and have a ceramic bell around them, secured with a brass nut that screws into the valve stem. I wanted something to act as a cushion between the nut and the creamic, so it could be tightened reasonable tight without breaking the ceramic - and also match the white ceramic and last a long time without discoloring. These work well - if I had to do over I'd probably get the next thicker width above 1/16th.
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Size: 010Nominal Width: 0.07Overall Width: 0.07Outside Diameter: 3/8Inside Diameter: 0.239Nominal Inside Diameter: 0.239Number of Items: 10Nominal Outside Diameter: 3/8 Verified Purchase
These rings can be used with advantage to replace the cork jet-seal rings in certain SU carburettors on classic cars. Until I found them on Amazon the only other sources had a minimum order of 50, and a twin carb set-up only needs 8.
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By Wink on February 23, 2015
Size: 259Nominal Width: 0.139Overall Width: 0.139Outside Diameter: 6-1/2Inside Diameter: 6.234Nominal Inside Diameter: 6.234Number of Items: 1Nominal Outside Diameter: 6-1/2 Verified Purchase
Too hard. I wanted 55A durometer but I didn't notice the D. Maybe make that more evident.
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