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Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes

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ASIN B005LRSAT0

Specifications for this item
Number of Items
382
Durometer
70A
Color Name
Black
Material Type
Nitrile Rubber
Part Number
650KIT70P
Brand Name
Small Parts
Cross Section Shape
Round
Upper Temperature Range
250  Degrees Fahrenheit
Specification Met
AS568A
Hardness
70A
UNSPSC Code
31410000
System of Measurement
Inch
LowerTemperature Range
-30  Degrees Fahrenheit

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Key Features

  • Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons and has a durometer (hardness) of 70A for resistance to penetration
  • Includes 382 pieces for covering 30 dash sizes
  • For use across a wide temperature range from -30 degrees F/-34 degrees C to 250 degrees F/121 degrees C
  • Meets Aerospace Standard AS568A for quality assurance
  • Plastic case for portability and organized storage

Package Details

Shipping Weight: 1.6 pounds
Package Size: 10.2 x 8 x 2.5 inches

Product Description

This O-ring set is made of black Buna-nitrile (Buna-N), has a durometer of 70A, and includes 382 pieces covering 30 dash sizes. The rings have 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). The rings come in a plastic storage case designed for organization and portability. Designed for use in a variety of sealing applications, from valves to engines, this Buna-nitrile O-ring set meets standards defined by Aerospace Standard AS568A for quality assurance.

The set includes the following O-rings: 20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, 012; 13 pieces each for dash sizes 110, 111, 112, 113, 114, 115, 116; 10 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222; and seven pieces each for dash sizes 325, 326, and 327.

Buna-nitrile can have high tensile strength, as well as 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 70A. 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.

What's in the box?

  • 20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, and 012
  • 13 pieces each for dash sizes 110, 111, 112, 113, 114, 115, and 116
  • 10 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, and 222
  • 7 pieces each for dash sizes 325, 326, and 327
  • Plastic storage case

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