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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).
AS568 Buna O-Rings
Unit of Measure
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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.

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O-Ring Industries

Quantity
249S70 N/A
192916 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 123.42 mm4.859 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -249 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
250S70 N/A
192917 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 126.59 mm4.984 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -250 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
251S70 N/A
192918 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 129.77 mm5.109 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -251 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
252S70 N/A
192919 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 132.94 mm5.234 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -252 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
253S70 N/A
192920 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 136.12 mm5.359 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -253 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
254S70 N/A
192921 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 139.29 mm5.484 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -254 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
255S70 N/A
192922 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 142.47 mm5.609 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -255 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
256S70 N/A
192923 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 145.64 mm5.734 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -256 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
257S70 N/A
192924 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 148.82 mm5.859 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -257 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
258S70 N/A
192925 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 151.99 mm5.984 in N/A 0.004 in0.10 mmNumeric N/A 0.035 in0.89 mmNumeric mm N/A -258 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
259S70 N/A
192926 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 158.34 mm6.234 in N/A 0.004 in0.10 mmNumeric N/A 0.040 in1.02 mmNumeric mm N/A -259 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
260S70 N/A
192927 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 164.69 mm6.484 in N/A 0.004 in0.10 mmNumeric N/A 0.040 in1.02 mmNumeric mm N/A -260 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
261S70 N/A
192928 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 171.04 mm6.734 in N/A 0.004 in0.10 mmNumeric N/A 0.040 in1.02 mmNumeric mm N/A -261 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
262S70 N/A
192929 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 177.39 mm6.984 in N/A 0.004 in0.10 mmNumeric N/A 0.040 in1.02 mmNumeric mm N/A -262 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
263S70 N/A
192930 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 183.74 mm7.234 in N/A 0.004 in0.10 mmNumeric N/A 0.045 in1.14 mmNumeric mm N/A -263 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
264S70 N/A
192931 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 190.09 mm7.484 in N/A 0.004 in0.10 mmNumeric N/A 0.045 in1.14 mmNumeric mm N/A -264 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
265S70 N/A
192932 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 196.44 mm7.734 in N/A 0.004 in0.10 mmNumeric N/A 0.045 in1.14 mmNumeric mm N/A -265 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
266S70 N/A
192933 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 202.79 mm7.984 in N/A 0.004 in0.10 mmNumeric N/A 0.045 in1.14 mmNumeric mm N/A -266 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
267S70 N/A
192934 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 209.14 mm8.234 in N/A 0.004 in0.10 mmNumeric N/A 0.050 in1.25 mmNumeric mm N/A -267 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
268S70 N/A
192935 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 215.49 mm8.484 in N/A 0.004 in0.10 mmNumeric N/A 0.050 in1.25 mmNumeric mm N/A -268 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
269S70 N/A
192936 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 221.84 mm8.734 in N/A 0.004 in0.10 mmNumeric N/A 0.050 in1.25 mmNumeric mm N/A -269 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
270S70 N/A
192937 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 228.19 mm8.984 in N/A 0.004 in0.10 mmNumeric N/A 0.050 in1.25 mmNumeric mm N/A -270 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
271S70 N/A
192938 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 234.54 mm9.234 in N/A 0.004 in0.10 mmNumeric N/A 0.055 in1.40 mmNumeric mm N/A -271 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
272S70 N/A
192939 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 240.89 mm9.484 in N/A 0.004 in0.10 mmNumeric N/A 0.055 in1.40 mmNumeric mm N/A -272 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
273S70 N/A
192940 		N/A Long Text N/A Long Text N/A 0.139 in3.53 mmNumeric mm N/A 70 N/A 247.24 mm9.734 in N/A 0.004 in0.10 mmNumeric N/A 0.055 in1.40 mmNumeric mm N/A -273 N/A N/A Long Text N/A Numeric N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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