-395 EPDM O-Ring, 70A Durometer, Black, 26" ID, 26-3/8" OD, 3/16" Width (Pack of 25)

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Price: $184.99    

Product Feature

• Made of ethylene propylene diene monomer (EPDM) rubber for use with a variety of chemicals and environments
• Can be used in a wide temperature range from -70 degrees F (-57 degrees C) to 300 degrees F (149 degrees C)
• Round in cross-section to provide a seal between cylindrical overlapping surfaces
• Durometer (hardness) of 70A for resistance to penetration
• Meets standards defined by Aerospace Standard AS568A

Product Description

This EPDM O-ring is black in color, round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications.

EPDM is acceptable for temperature applications between -70 degrees F (-57 degrees C) to 300 degrees F (149 degrees C). It is compatible for use with water and steam, silicone oil and grease, polar solvents (alcohols), acids, glycol-based brake fluids, ozone, and weathering. It is vulnerable to many oils, gasoline, and solvents. This material meets ASTM International standards.

This EPDM 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.

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 EPDM O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.

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-395 EPDM O-Ring, 70A Durometer, Black, 26" ID, 26-3/8" OD, 3/16" Width (Pack of 25) Review

Item arrived on-time and in good condition in a sealed plastic bag. Labeling on the bag included general item description (EPDM O-ring black -228), part count and part and stock-keeping numbers, but omitted the size specifications. There was no obvious damage or defects and the part count was correct.

The rubber seem to be of good quality and is firm, smooth and dry, with a light residue of release-agent powder (this is acceptable). It should be noted that the cross-sections of the O-rings are not perfectly round; there is a very slight lip on the inner- and outer-most diameters. This is no doubt where the dies met for the molding process, and is unlikely to interfere with performance. Measurement of about half a dozen or so pieces revealed all actual dimensions (which differ from the nominal dimensions--I highly recommend consulting the "Product Details" section) to be within specified tolerances.

All-in-all, these seem to be fine quality O-rings, though not quite top-of-the-line. Still, for the price I paid at the time (less than $1--Small Parts's prices can fluctuate quite a bit, I recommend checking them frequently), they were an OUTSTANDING value. Recommended.

Most of the consumer Reviews tell that the "-395 EPDM O-Ring, 70A Durometer, Black, 26" ID, 26-3/8" OD, 3/16" Width (Pack of 25)" are high quality item. You can read each testimony from consumers to find out cons and pros from -395 EPDM O-Ring, 70A Durometer, Black, 26" ID, 26-3/8" OD, 3/16" Width (Pack of 25) ...