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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. EP is also known as: Eythylene Propylene, EPR, EPDM, EPT, E.

EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols.
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
-249 EP-70 N/A
190672
N/A N/A N/A 0.139 in N/A 70 N/A 123.42 mm4.859 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -249 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-250 EP-70 N/A
190673
N/A N/A N/A 0.139 in N/A 70 N/A 126.59 mm4.984 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -250 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-251 EP-70 N/A
190674
N/A N/A N/A 0.139 in N/A 70 N/A 129.77 mm5.109 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -251 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-252 EP-70 N/A
190675
N/A N/A N/A 0.139 in N/A 70 N/A 132.94 mm5.234 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -252 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-253 EP-70 N/A
190676
N/A N/A N/A 0.139 in N/A 70 N/A 136.12 mm5.359 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -253 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-254 EP-70 N/A
190677
N/A N/A N/A 0.139 in N/A 70 N/A 139.29 mm5.484 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -254 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-255 EP-70 N/A
190678
N/A N/A N/A 0.139 in N/A 70 N/A 142.47 mm5.609 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -255 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-256 EP-70 N/A
190679
N/A N/A N/A 0.139 in N/A 70 N/A 145.64 mm5.734 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -256 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-257 EP-70 N/A
190680
N/A N/A N/A 0.139 in N/A 70 N/A 148.82 mm5.859 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -257 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-258 EP-70 N/A
190681
N/A N/A N/A 0.139 in N/A 70 N/A 151.99 mm5.984 in N/A 0.004 in0.10 mm N/A 0.035 in0.89 mm N/A -258 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-259 EP-70 N/A
190682
N/A N/A N/A 0.139 in N/A 70 N/A 158.34 mm6.234 in N/A 0.004 in0.10 mm N/A 0.040 in1.02 mm N/A -259 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-260 EP-70 N/A
190683
N/A N/A N/A 0.139 in N/A 70 N/A 164.69 mm6.484 in N/A 0.004 in0.10 mm N/A 0.040 in1.02 mm N/A -260 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-261 EP-70 N/A
190684
N/A N/A N/A 0.139 in N/A 70 N/A 171.04 mm6.734 in N/A 0.004 in0.10 mm N/A 0.040 in1.02 mm N/A -261 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-262 EP-70 N/A
190685
N/A N/A N/A 0.139 in N/A 70 N/A 177.39 mm6.984 in N/A 0.004 in0.10 mm N/A 0.040 in1.02 mm N/A -262 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-263 EP-70 N/A
190686
N/A N/A N/A 0.139 in N/A 70 N/A 183.74 mm7.234 in N/A 0.004 in0.10 mm N/A 0.045 in1.14 mm N/A -263 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-264 EP-70 N/A
190687
N/A N/A N/A 0.139 in N/A 70 N/A 190.09 mm7.484 in N/A 0.004 in0.10 mm N/A 0.045 in1.14 mm N/A -264 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-265 EP-70 N/A
190688
N/A N/A N/A 0.139 in N/A 70 N/A 196.44 mm7.734 in N/A 0.004 in0.10 mm N/A 0.045 in1.14 mm N/A -265 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-266 EP-70 N/A
190689
N/A N/A N/A 0.139 in N/A 70 N/A 202.79 mm7.984 in N/A 0.004 in0.10 mm N/A 0.045 in1.14 mm N/A -266 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-267 EP-70 N/A
190690
N/A N/A N/A 0.139 in N/A 70 N/A 209.14 mm8.234 in N/A 0.004 in0.10 mm N/A 0.050 in1.25 mm N/A -267 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-268 EP-70 N/A
190691
N/A N/A N/A 0.139 in N/A 70 N/A 215.49 mm8.484 in N/A 0.004 in0.10 mm N/A 0.050 in1.25 mm N/A -268 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-269 EP-70 N/A
190692
N/A N/A N/A 0.139 in N/A 70 N/A 221.84 mm8.734 in N/A 0.004 in0.10 mm N/A 0.050 in1.25 mm N/A -269 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-270 EP-70 N/A
190693
N/A N/A N/A 0.139 in N/A 70 N/A 228.19 mm8.984 in N/A 0.004 in0.10 mm N/A 0.050 in1.25 mm N/A -270 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-271 EP-70 N/A
190694
N/A N/A N/A 0.139 in N/A 70 N/A 234.54 mm9.234 in N/A 0.004 in0.10 mm N/A 0.055 in1.40 mm N/A -271 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-272 EP-70 N/A
190695
N/A N/A N/A 0.139 in N/A 70 N/A 240.89 mm9.484 in N/A 0.004 in0.10 mm N/A 0.055 in1.40 mm N/A -272 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-273 EP-70 N/A
190696
N/A N/A N/A 0.139 in N/A 70 N/A 247.24 mm9.734 in N/A 0.004 in0.10 mm N/A 0.055 in1.40 mm N/A -273 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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