0 items added

To add items, choose from the table below

Image is representative of the product family. Select individual products in the table below for more specific images and product specifications

Buna O-Ring, 90A Durometer, Round, Black

Available in multiple versions

4.4 out of 5 stars 16 customer reviews

Price: $2.24 - $33.00
Product Specifications
Brand Name Small Parts
Material Type Nitrile Rubber
Hardness 90 A Durometer
System of Measurement Inch
Color Black
Cross Section Shape Round
LowerTemperature Range -30  Degrees Fahrenheit
Upper Temperature Range 250  Degrees Fahrenheit
Specification Met AS568A
Durometer 90a
UNSPSC Code 31410000

Currently showing 1-20 of 632 Next »
ASIN
The Amazon Standard Item Number (ASIN) uniquely identifies the item in the Amazon catalog.
Size Nominal Inside Diameter Nominal Outside Diameter Nominal Width Inside Diameter Outside Diameter Overall Width Number of Items Price Quantity
   
B0051XYKV6 001 0.029 inches 3/32 inches 0.04 inches 0.029 inches 3/32 inches 0.04 inches 100
$2.24
+ Shipping
B00M90AR6G 001 0.029 inches 3/32 inches 0.040 inches 0.029 inches 0.109 inches 0.040 inches 1000
$13.09
B0051XYKY8 002 0.042 inches 9/64 inches 0.05 inches 0.042 inches 9/64 inches 0.05 inches 100
$8.45
B00M90AR7A 002 0.042 inches 9/64 inches 0.050 inches 0.042 inches 0.142 inches 0.050 inches 1000
$4.24
+ Shipping
B0051XYL2E 003 0.056 inches 3/16 inches 0.06 inches 0.056 inches 3/16 inches 0.06 inches 100
$4.97
B00M90AR7U 003 0.056 inches 3/16 inches 0.060 inches 0.056 inches 0.176 inches 0.060 inches 1000
$4.16
+ Shipping
B0051XYL8S 004 0.07 inches 13/64 inches 0.07 inches 0.07 inches 13/64 inches 0.07 inches 100
$8.60
B00M90AONW 004 0.070 inches 13/64 inches 0.070 inches 0.070 inches 0.210 inches 0.070 inches 1000
$4.16
+ Shipping
B0051XYLAG 005 0.101 inches 7/32 inches 0.07 inches 0.101 inches 7/32 inches 0.07 inches 100
$8.33
B00M90AP0E 005 0.101 inches 7/32 inches 0.070 inches 0.101 inches 0.241 inches 0.070 inches 1000
$3.82
+ Shipping
B0051XYLDI 006 0.114 inches 1/4 inches 0.07 inches 0.114 inches 1/4 inches 0.07 inches 100
$4.47
B00M90AOY6 006 0.114 inches 1/4 inches 0.070 inches 0.114 inches 0.254 inches 0.070 inches 1000
$12.29
B0051XYLI8 007 0.145 inches 9/32 inches 0.07 inches 0.145 inches 9/32 inches 0.07 inches 100
$4.48
B00M90AOMS 007 0.145 inches 9/32 inches 0.070 inches 0.145 inches 0.285 inches 0.070 inches 1000
$12.29
B0051XYLK6 008 0.176 inches 5/16 inches 0.07 inches 0.176 inches 5/16 inches 0.07 inches 100
$4.53
B00M90AOLY 008 0.176 inches 5/16 inches 0.070 inches 0.176 inches 0.316 inches 0.070 inches 1000
$12.29
B0051XYLO2 009 0.208 inches 11/32 inches 0.07 inches 0.208 inches 11/32 inches 0.07 inches 100
$8.24
B00M90ALOY 009 0.208 inches 11/32 inches 0.070 inches 0.208 inches 0.348 inches 0.070 inches 1000
$12.29
B0051XYLSS 010 0.239 inches 3/8 inches 0.07 inches 0.239 inches 3/8 inches 0.07 inches 100
$8.46
B00M90ALJE 010 0.239 inches 3/8 inches 0.070 inches 0.239 inches 0.379 inches 0.070 inches 1000
$12.29
Currently showing 1-20 of 632 Next »
Could not load your selection

We're sorry. An error occured when we tried to load your product family table. Rest assured, we're working to resolve the problem as soon as possible. Please refresh the page.


Product Features

  • Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons
  • Durometer (hardness) of 90A for resistance to penetration
  • Round cross-section to provide a seal between cylindrical overlapping surfaces
  • For use across a wide temperature range from -30 degrees F/-34 degrees C to 250 degrees F/121 degrees C
  • Meets standards defined by Aerospace Standard AS568A

Product Description

This O-ring is made of black Buna-nitrile (Buna-N) and has a durometer of 90A. It has a round cross-section and can be used across a wide temperature range (-30 degrees F/-34 degrees C to 250 degrees F/121 degrees C). Designed for use in a wide variety of sealing applications, this Buna-nitrile O-ring meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.

Buna-nitrile can have high tensile strength, and has abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.

The durometer hardness of this Buna O-ring is 90A. Durometers measure 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, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for softer plastics, while shore D is used for harder plastics.

O-rings 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 AS568A dash sizes, which is the standardized sizing for O-rings, and defines the nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter of an O-ring.


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: B0052AU0W6
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (16 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 011Nominal Width: 0.07Overall Width: 0.07Outside Diameter: 7/16Inside Diameter: 0.301Nominal Inside Diameter: 0.301Number of Items: 100Nominal Outside Diameter: 7/16 Verified Purchase
Each one of these little circles of perfection represents everything I've ever dreamed of in an o-ring. I only needed one, but now am am rich with an over-abundance, having 99 extra for a nominal fee.
Comment One person found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Size: 453Nominal Width: 0.275Overall Width: 0.275Outside Diameter: 12-1/2Inside Diameter: 11.975Nominal Inside Diameter: 11.975Number of Items: 2Nominal Outside Diameter: 12-1/2 Verified Purchase
453 o-ring should have 12" ID per description, but it actually was more like 14". Had to return it. Could not order another since any replacement would have the same order number and likely the same problem.
3 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Size: 037Nominal Width: 0.07Overall Width: 0.07Outside Diameter: 2-5/8Inside Diameter: 2.489Nominal Inside Diameter: 2.489Number of Items: 50Nominal Outside Diameter: 2-5/8 Verified Purchase
Aquasana stopped sending O-rings w/their replacement filters so I measured and found these- way more than I wanted to buy- and they fit perfectly.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Size: 001Nominal Width: 0.04Overall Width: 0.04Outside Diameter: 3/32Inside Diameter: 0.029Nominal Inside Diameter: 0.029Number of Items: 100Nominal Outside Diameter: 3/32 Verified Purchase
The o-rings I ordered are in fact tough buna 90a. Most of the sizes are fairly priced, and the o-rings themselves quality. Recommended
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Size: 322Nominal Width: 0.21Overall Width: 0.21Outside Diameter: 1-5/8Inside Diameter: 1.225Nominal Inside Diameter: 1.225Number of Items: 50Nominal Outside Diameter: 1-5/8 Verified Purchase
THis is good hard rubber, not stretchy as I feared. Serves the purpose. Had to buy a few more than needed but they were cheap
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Buna O-Ring, 90A Durometer, Round, Black Website says the 453 o-ring is 12" ID. Even though the sealed bag was labled "453" and had the correct part numbers as shown on the web page, it actually contained 14" o-rings. I had to return it to Amazon for a $15 refund, since there is no way to exchange it for the correct part. Does anyone know where I can get a 12" ID o-ring 1/4" to 1/2" in cross-section?
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Size: 011Nominal Width: 0.07Overall Width: 0.07Outside Diameter: 7/16Inside Diameter: 0.301Nominal Inside Diameter: 0.301Number of Items: 100Nominal Outside Diameter: 7/16 Verified Purchase
I purchased this product for a particular application and they perform without a hitch. Buying these in bulk from this seller is far more economical than running down the local hardware store.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
By lottp on September 25, 2014
Size: 002Nominal Width: 0.05Overall Width: 0.05Outside Diameter: 9/64Inside Diameter: 0.042Nominal Inside Diameter: 0.042Number of Items: 100Nominal Outside Diameter: 9/64 Verified Purchase
You get a lot for your money. They appear to be very consistent and of good quality. Very durable.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse

Pages with Related Products. See and discover other items: rubber o rings