O-ring Application Functional Description
An o-ring is a simple and versatile ring-shaped packing or sealing device with a circular cross section, from which the "O" in its name is derived. O-rings function as compact and reliable sealing devices by absorbing the tolerance stack-up between closely mated surfaces in both dynamic (moving) and static (stationary) applications.
An oring seals by blocking any potential leak path of a fluid (liquid or gas) between two closely spaced surfaces. The oring is generally installed in a machined groove in one of the surfaces to be sealed. As the two surfaces are brought together, forming a gland, they squeeze the cross section of the o-ring.
Columbia engineers are available to assist you in selecting the right seal for your application, including material, size, and mating gland design and associate seal squeeze. Please contact us today to discuss your application. 937.890.7464 ext19
O-Ring Properties & Descriptions |
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Metric O-ring Sizes |
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Cross Section |
Product Data Sheet |
millimeters |
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1.00, 1.02 |
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1.50, 1.52 |
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1.60, 1.63 |
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1.78, 1.80, 1.52 |
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1.90, 1.98 |
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2.00, 2.08 |
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2.40, 2.46 |
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2.50, 2.55 |
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2.62, 2.70, 2.95 |
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3.00 |
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3.50 |
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3.53, 3.55, 3.60 |
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4.00, 4.50 |
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5.00, 5.30, 5.33 |
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5.70, 6.00 |
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6.99, 7.30, 8.40 |
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AS-568A Standard O-ring Sizes
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Cross Section |
Dash Number |
Product Data Sheet |
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Nominal |
Actual |
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1/16" |
.070" |
001 thru 050 |
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3/32" |
.103" |
102 thru 178 |
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1/8" |
.139" |
201 thru 284 |
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3/16" |
.210" |
309 thru 395 |
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1/4" |
.275" |
425 thru 475 |
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*** |
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901 thru 932 |
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