This appears to be a standard AS568-010 o-ring.
https://www.amazon.com/010-Buna-N-O...id=1485696494&sr=8-14&keywords=buna-n+o-rings
Crown Bolt 3/8 in. x 1/4 in. x 1/16 in. Buna Rubber O-Ring (2-Bag)-83798 - The Home Depot
010 Buna-N O-Ring, 70A Durometer, Black, 1/4" ID, 3/8" OD, 1/16" Width (Pack of 100)
$7 USD on Amazon
This O-ring is made of black Buna-nitrile, is round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications.
Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.
This Buna 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.
These Buna-nitrile O-rings meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
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https://www.amazon.com/010-Buna-N-O...id=1485696494&sr=8-14&keywords=buna-n+o-rings
Crown Bolt 3/8 in. x 1/4 in. x 1/16 in. Buna Rubber O-Ring (2-Bag)-83798 - The Home Depot
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Joined·10,542 Posts
Caution: Neither of these worked for my P320 TDL. They don't quite fit snugly in the TDL's slot, and the TDL does not go into the frame all the way. Looks like I'll be ordering some from SIG.
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