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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
-427 EP-70 N/A
190822 		N/A N/A N/A 0.275 in N/A 70 N/A 120.02 mm4.725 in N/A 0.006 in0.15 mm N/A 0.033 in0.83 mm N/A -427 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-428 EP-70 N/A
190823 		N/A N/A N/A 0.275 in N/A 70 N/A 123.19 mm4.850 in N/A 0.006 in0.15 mm N/A 0.033 in0.83 mm N/A -428 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-429 EP-70 N/A
190824 		N/A N/A N/A 0.275 in N/A 70 N/A 126.37 mm4.975 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -429 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-430 EP-70 N/A
190825 		N/A N/A N/A 0.275 in N/A 70 N/A 129.54 mm5.100 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -430 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-431 EP-70 N/A
190826 		N/A N/A N/A 0.275 in N/A 70 N/A 132.72 mm5.225 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -431 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-432 EP-70 N/A
190827 		N/A N/A N/A 0.275 in N/A 70 N/A 135.89 mm5.350 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -432 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-433 EP-70 N/A
190828 		N/A N/A N/A 0.275 in N/A 70 N/A 139.07 mm5.475 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -433 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-434 EP-70 N/A
190829 		N/A N/A N/A 0.275 in N/A 70 N/A 142.24 mm5.600 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -434 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-435 EP-70 N/A
190830 		N/A N/A N/A 0.275 in N/A 70 N/A 145.42 mm5.725 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -435 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-436 EP-70 N/A
190831 		N/A N/A N/A 0.275 in N/A 70 N/A 148.59 mm5.850 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -436 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-437 EP-70 N/A
190832 		N/A N/A N/A 0.275 in N/A 70 N/A 151.77 mm5.975 in N/A 0.006 in0.15 mm N/A 0.037 in0.93 mm N/A -437 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-438 EP-70 N/A
190833 		N/A N/A N/A 0.275 in N/A 70 N/A 158.12 mm6.225 in N/A 0.006 in0.15 mm N/A 0.040 in1.01 mm N/A -438 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-439 EP-70 N/A
190834 		N/A N/A N/A 0.275 in N/A 70 N/A 164.47 mm6.475 in N/A 0.006 in0.15 mm N/A 0.040 in1.01 mm N/A -439 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-440 EP-70 N/A
190835 		N/A N/A N/A 0.275 in N/A 70 N/A 170.82 mm6.725 in N/A 0.006 in0.15 mm N/A 0.040 in1.01 mm N/A -440 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-441 EP-70 N/A
190836 		N/A N/A N/A 0.275 in N/A 70 N/A 177.17 mm6.975 in N/A 0.006 in0.15 mm N/A 0.040 in1.01 mm N/A -441 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-442 EP-70 N/A
190837 		N/A N/A N/A 0.275 in N/A 70 N/A 183.52 mm7.225 in N/A 0.006 in0.15 mm N/A 0.045 in1.14 mm N/A -442 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-443 EP-70 N/A
190838 		N/A N/A N/A 0.275 in N/A 70 N/A 189.87 mm7.475 in N/A 0.006 in0.15 mm N/A 0.045 in1.14 mm N/A -443 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-444 EP-70 N/A
190839 		N/A N/A N/A 0.275 in N/A 70 N/A 196.22 mm7.725 in N/A 0.006 in0.15 mm N/A 0.045 in1.14 mm N/A -444 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-445 EP-70 N/A
190840 		N/A N/A N/A 0.275 in N/A 70 N/A 202.57 mm7.975 in N/A 0.006 in0.15 mm N/A 0.045 in1.14 mm N/A -445 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-446 EP-70 N/A
190841 		N/A N/A N/A 0.275 in N/A 70 N/A 215.27 mm8.475 in N/A 0.006 in0.15 mm N/A 0.055 in1.40 mm N/A -446 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-447 EP-70 N/A
190842 		N/A N/A N/A 0.275 in N/A 70 N/A 227.97 mm8.975 in N/A 0.006 in0.15 mm N/A 0.055 in1.40 mm N/A -447 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-448 EP-70 N/A
190843 		N/A N/A N/A 0.275 in N/A 70 N/A 240.67 mm9.475 in N/A 0.006 in0.15 mm N/A 0.055 in1.40 mm N/A -448 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-449 EP-70 N/A
190844 		N/A N/A N/A 0.275 in N/A 70 N/A 253.37 mm9.975 in N/A 0.006 in0.15 mm N/A 0.055 in1.40 mm N/A -449 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-450 EP-70 N/A
190845 		N/A N/A N/A 0.275 in N/A 70 N/A 266.07 mm10.475 in N/A 0.006 in0.15 mm N/A 0.060 in1.52 mm N/A -450 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-451 EP-70 N/A
190846 		N/A N/A N/A 0.275 in N/A 70 N/A 278.77 mm10.975 in N/A 0.006 in0.15 mm N/A 0.060 in1.52 mm N/A -451 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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