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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.
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

Units of Measure

Tube Size O.D.

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O-Ring Industries

Quantity
-249 PTFE N/A
195405
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-250 PTFE N/A
195406
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-251 PTFE N/A
195407
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-252 PTFE N/A
195408
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-253 PTFE N/A
195409
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-254 PTFE N/A
195410
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-255 PTFE N/A
195411
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-256 PTFE N/A
195412
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-257 PTFE N/A
195413
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-258 PTFE N/A
195414
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-259 PTFE N/A
195415
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-260 PTFE N/A
195416
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-261 PTFE N/A
195417
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-262 PTFE N/A
195418
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-263 PTFE N/A
195419
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-264 PTFE N/A
195420
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-265 PTFE N/A
195421
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-266 PTFE N/A
195422
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-267 PTFE N/A
195423
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-268 PTFE N/A
195424
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-269 PTFE N/A
195425
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-270 PTFE N/A
195426
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-271 PTFE N/A
195427
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-272 PTFE N/A
195428
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
-273 PTFE N/A
195429
N/A N/A N/A 0.139 in3.53 mm N/A 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 O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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