AS568 Polyurethane O-Rings
Standard O-Rings (AS568)
Standard O-Rings are available in 369 sizes as set up by the Aerospace Standard 568 published by the Society of Automotive Engineers. These sizes are designated by dash numbers shown on the 568 DASH Chart and are standardized by imperial dimensions. Standard O-Rings are specified by their inside diameter and cross section width. AS568 is the most commonly used standard in the U.S. for aerospace, automotive and general industrial applications.
Polyurethane is also known as urethane, cast urethan and millable urethane. Exceptional tensile strength. Abrasion and low temperature resistance. Typical applications include hydraulic seals, gaskets, diaphragms, hoses, and wheels for skate boards.
For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Polyurethane is also known as urethane, cast urethan and millable urethane. Exceptional tensile strength. Abrasion and low temperature resistance. Typical applications include hydraulic seals, gaskets, diaphragms, hoses, and wheels for skate boards.
For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Item # |
IntegrationID |
Type |
Material |
Cross Section Width |
Durometer |
Inside Diameter |
Cross Section Tolerance +/- |
Inside Diameter Tolerance +/- |
Size Reference - AS568 |
Alternate P/N |
Units of Measure |
Tube Size O.D. |
Call for a Quote |
O-Ring Industries |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | ||||||||||||||
| -221 U-70 |
IntegrationID
N/A 191165 |
Type N/A | Material N/A | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 36.09 mm1.421 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mm | Inside Diameter Tolerance +/- N/A 0.012 in0.30 mm | Size Reference - AS568 N/A -221 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -221 U-90 |
IntegrationID
N/A 191166 |
Type N/A | Material N/A | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 36.09 mm1.421 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mm | Inside Diameter Tolerance +/- N/A 0.012 in0.30 mm | Size Reference - AS568 N/A -221 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -395 U-70 |
IntegrationID
N/A 191465 |
Type N/A | Material N/A | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 658.88 mm25.940 in | Cross Section Tolerance +/- N/A 0.005 in0.12 mm | Inside Diameter Tolerance +/- N/A 0.012 in3.05 mm | Size Reference - AS568 N/A -395 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -395 U-90 |
IntegrationID
N/A 191466 |
Type N/A | Material N/A | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 658.88 mm25.940 in | Cross Section Tolerance +/- N/A 0.005 in0.12 mm | Inside Diameter Tolerance +/- N/A 0.012 in3.05 mm | Size Reference - AS568 N/A -395 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -918 Polyurethane-90 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.116 in | Durometer N/A 90 | Inside Diameter N/A 1.355 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.012 in | Size Reference - AS568 N/A -918 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/8 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -918 Polyurethane-75 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.116 in | Durometer N/A 75 | Inside Diameter N/A 1.355 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.012 in | Size Reference - AS568 N/A -918 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/8 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -918 Polyurethane-70 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.116 in | Durometer N/A 70 | Inside Diameter N/A 1.355 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.012 in | Size Reference - AS568 N/A -918 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/8 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -028 U-70 |
IntegrationID
N/A 190925 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 34.65 mm1.364 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -028 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -028 U-90 |
IntegrationID
N/A 190926 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 34.65 mm1.364 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -028 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -029 U-70 |
IntegrationID
N/A 190927 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 37.82 mm1.489 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -029 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -029 U-90 |
IntegrationID
N/A 190928 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 37.82 mm1.489 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -029 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -030 U-70 |
IntegrationID
N/A 190929 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 41.00 mm1.614 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -030 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -030 U-90 |
IntegrationID
N/A 190930 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 41.00 mm1.614 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.013 in0.33 mm | Size Reference - AS568 N/A -030 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries.v |
| -920 Polyurethane-70 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 70 | Inside Diameter N/A 1.475 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -920 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/4 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -924 Polyurethane-70 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 70 | Inside Diameter N/A 1.720 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -924 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/2 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -920 Polyurethane-75 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 75 | Inside Diameter N/A 1.475 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -920 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/4 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -924 Polyurethane-75 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 75 | Inside Diameter N/A 1.720 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -924 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/2 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries.v | |
| -920 Polyurethane-90 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 90 | Inside Diameter N/A 1.475 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -920 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/4 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -924 Polyurethane-90 | Type N/A AS568 Standard O-Rings | Material N/A Polyurethane | Cross Section Width N/A 0.118 in | Durometer N/A 90 | Inside Diameter N/A 1.720 in | Cross Section Tolerance +/- N/A 0.004 in | Inside Diameter Tolerance +/- N/A 0.014 in | Size Reference - AS568 N/A -924 | Alternate P/N N/A | Units of Measure N/A Imperial | Tube Size O.D. N/A 1-1/2 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. | |
| -031 U-70 |
IntegrationID
N/A 190931 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 44.17 mm1.739 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.36 mm | Size Reference - AS568 N/A -031 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -031 U-90 |
IntegrationID
N/A 190932 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 44.17 mm1.739 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.36 mm | Size Reference - AS568 N/A -031 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -032 U-70 |
IntegrationID
N/A 190933 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 47.35 mm1.864 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.38 mm | Size Reference - AS568 N/A -032 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -032 U-90 |
IntegrationID
N/A 190934 |
Type N/A | Material N/A | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 47.35 mm1.864 in | Cross Section Tolerance +/- N/A 0.003 in0.08 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.38 mm | Size Reference - AS568 N/A -032 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -400 U-70 |
IntegrationID
N/A 191467 |
Type N/A | Material N/A | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 34.29 mm1.350 in | Cross Section Tolerance +/- N/A 0.006 in0.15 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.38 mm | Size Reference - AS568 N/A -400 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
| -400 U-90 |
IntegrationID
N/A 191468 |
Type N/A | Material N/A | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 34.29 mm1.350 in | Cross Section Tolerance +/- N/A 0.006 in0.15 mm | Inside Diameter Tolerance +/- N/A 0.015 in0.38 mm | Size Reference - AS568 N/A -400 | Alternate P/N N/A | Units of Measure N/A | Tube Size O.D. N/A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
