AS568 Silicone 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. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C).
This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C).
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Cross Section Width (in)
Cross Section Width (mm)
Cross Section Width (mm)
Inside Diameter (mm)
Inside Diameter (in)
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 |
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249S70 249S70/Asset/oring71.jpg |
IntegrationID
N/A 192916 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 123.42 mm4.859 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -249 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
250S70 250S70/Asset/oring71.jpg |
IntegrationID
N/A 192917 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 126.59 mm4.984 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -250 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
251S70 251S70/Asset/oring71.jpg |
IntegrationID
N/A 192918 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 129.77 mm5.109 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -251 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
252S70 252S70/Asset/oring71.jpg |
IntegrationID
N/A 192919 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 132.94 mm5.234 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -252 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
253S70 253S70/Asset/oring71.jpg |
IntegrationID
N/A 192920 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 136.12 mm5.359 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -253 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
254S70 254S70/Asset/oring71.jpg |
IntegrationID
N/A 192921 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 139.29 mm5.484 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -254 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
255S70 255S70/Asset/oring71.jpg |
IntegrationID
N/A 192922 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 142.47 mm5.609 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -255 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
256S70 256S70/Asset/oring71.jpg |
IntegrationID
N/A 192923 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 145.64 mm5.734 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -256 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
257S70 257S70/Asset/oring71.jpg |
IntegrationID
N/A 192924 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 148.82 mm5.859 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -257 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
258S70 258S70/Asset/oring71.jpg |
IntegrationID
N/A 192925 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 151.99 mm5.984 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.035 in0.89 mmNumeric mm | Size Reference - AS568 N/A -258 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
259S70 259S70/Asset/oring71.jpg |
IntegrationID
N/A 192926 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 158.34 mm6.234 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.040 in1.02 mmNumeric mm | Size Reference - AS568 N/A -259 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
260S70 260S70/Asset/oring71.jpg |
IntegrationID
N/A 192927 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 164.69 mm6.484 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.040 in1.02 mmNumeric mm | Size Reference - AS568 N/A -260 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
261S70 261S70/Asset/oring71.jpg |
IntegrationID
N/A 192928 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 171.04 mm6.734 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.040 in1.02 mmNumeric mm | Size Reference - AS568 N/A -261 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
262S70 262S70/Asset/oring71.jpg |
IntegrationID
N/A 192929 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 177.39 mm6.984 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.040 in1.02 mmNumeric mm | Size Reference - AS568 N/A -262 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
263S70 263S70/Asset/oring71.jpg |
IntegrationID
N/A 192930 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 183.74 mm7.234 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.045 in1.14 mmNumeric mm | Size Reference - AS568 N/A -263 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
264S70 264S70/Asset/oring71.jpg |
IntegrationID
N/A 192931 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 190.09 mm7.484 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.045 in1.14 mmNumeric mm | Size Reference - AS568 N/A -264 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
265S70 265S70/Asset/oring71.jpg |
IntegrationID
N/A 192932 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 196.44 mm7.734 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.045 in1.14 mmNumeric mm | Size Reference - AS568 N/A -265 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
266S70 266S70/Asset/oring71.jpg |
IntegrationID
N/A 192933 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 202.79 mm7.984 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.045 in1.14 mmNumeric mm | Size Reference - AS568 N/A -266 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
267S70 267S70/Asset/oring71.jpg |
IntegrationID
N/A 192934 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 209.14 mm8.234 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.050 in1.25 mmNumeric mm | Size Reference - AS568 N/A -267 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
268S70 268S70/Asset/oring71.jpg |
IntegrationID
N/A 192935 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 215.49 mm8.484 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.050 in1.25 mmNumeric mm | Size Reference - AS568 N/A -268 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
269S70 269S70/Asset/oring71.jpg |
IntegrationID
N/A 192936 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 221.84 mm8.734 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.050 in1.25 mmNumeric mm | Size Reference - AS568 N/A -269 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
270S70 270S70/Asset/oring71.jpg |
IntegrationID
N/A 192937 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 228.19 mm8.984 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.050 in1.25 mmNumeric mm | Size Reference - AS568 N/A -270 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
271S70 271S70/Asset/oring71.jpg |
IntegrationID
N/A 192938 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 234.54 mm9.234 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.055 in1.40 mmNumeric mm | Size Reference - AS568 N/A -271 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
272S70 272S70/Asset/oring71.jpg |
IntegrationID
N/A 192939 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 240.89 mm9.484 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.055 in1.40 mmNumeric mm | Size Reference - AS568 N/A -272 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
273S70 273S70/Asset/oring71.jpg |
IntegrationID
N/A 192940 |
Type N/A Long Text | Material N/A Long Text | Cross Section Width N/A 0.139 in3.53 mmNumeric mm | Durometer N/A 70 | Inside Diameter N/A 247.24 mm9.734 in | Cross Section Tolerance +/- N/A 0.004 in0.10 mmNumeric | Inside Diameter Tolerance +/- N/A 0.055 in1.40 mmNumeric mm | Size Reference - AS568 N/A -273 | Alternate P/N N/A | Units of Measure N/A Long Text | Tube Size O.D. N/A Numeric | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |