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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
-274 EP-70 N/A
190697 		N/A N/A N/A 0.139 in N/A 70 N/A 253.59 mm9.984 in N/A 0.004 in0.10 mm N/A 0.055 in1.40 mm N/A -274 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-275 EP-70 N/A
190698 		N/A N/A N/A 0.139 in N/A 70 N/A 266.29 mm10.484 in N/A 0.004 in0.10 mm N/A 0.055 in1.40 mm N/A -275 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-276 EP-70 N/A
190699 		N/A N/A N/A 0.139 in N/A 70 N/A 278.99 mm10.984 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -276 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-277 EP-70 N/A
190700 		N/A N/A N/A 0.139 in N/A 70 N/A 291.69 mm11.484 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -277 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-278 EP-70 N/A
190701 		N/A N/A N/A 0.139 in N/A 70 N/A 304.39 mm11.984 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -278 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-279 EP-70 N/A
190702 		N/A N/A N/A 0.139 in N/A 70 N/A 329.79 mm12.984 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -279 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-280 EP-70 N/A
190703 		N/A N/A N/A 0.139 in N/A 70 N/A 355.19 mm13.984 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -280 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-281 EP-70 N/A
190704 		N/A N/A N/A 0.139 in N/A 70 N/A 380.59 mm14.984 in N/A 0.004 in0.10 mm N/A 0.065 in1.65 mm N/A -281 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-282 EP-70 N/A
190705 		N/A N/A N/A 0.139 in N/A 70 N/A 405.26 mm15.955 in N/A 0.004 in0.10 mm N/A 0.075 in1.90 mm N/A -282 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-283 EP-70 N/A
190706 		N/A N/A N/A 0.139 in N/A 70 N/A 430.66 mm16.955 in N/A 0.004 in0.10 mm N/A 0.080 in2.05 mm N/A -283 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-284 EP-70 N/A
190707 		N/A N/A N/A 0.139 in N/A 70 N/A 456.06 mm17.955 in N/A 0.004 in0.10 mm N/A 0.085 in2.15 mm N/A -284 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-309 EP-70 N/A
190708 		N/A N/A N/A 0.210 in N/A 70 N/A 10.46 mm0.412 in N/A 0.005 in0.12 mm N/A 0.005 in0.12 mm N/A -309 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-310 EP-70 N/A
190709 		N/A N/A N/A 0.210 in N/A 70 N/A 12.07 mm0.475 in N/A 0.005 in0.12 mm N/A 0.005 in0.12 mm N/A -310 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-311 EP-70 N/A
190710 		N/A N/A N/A 0.210 in N/A 70 N/A 13.64 mm0.537 in N/A 0.005 in0.12 mm N/A 0.007 in0.17 mm N/A -311 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-312 EP-70 N/A
190711 		N/A N/A N/A 0.210 in N/A 70 N/A 15.24 mm0.600 in N/A 0.005 in0.12 mm N/A 0.009 in0.22 mm N/A -312 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-313 EP-70 N/A
190712 		N/A N/A N/A 0.210 in N/A 70 N/A 16.81 mm0.662 in N/A 0.005 in0.12 mm N/A 0.009 in0.22 mm N/A -313 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-314 EP-70 N/A
190713 		N/A N/A N/A 0.210 in N/A 70 N/A 18.42 mm0.725 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -314 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-315 EP-70 N/A
190714 		N/A N/A N/A 0.210 in N/A 70 N/A 19.99 mm0.787 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -315 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-316 EP-70 N/A
190715 		N/A N/A N/A 0.210 in N/A 70 N/A 21.59 mm0.850 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -316 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-317 EP-70 N/A
190716 		N/A N/A N/A 0.210 in N/A 70 N/A 23.16 mm0.912 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -317 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-318 EP-70 N/A
190717 		N/A N/A N/A 0.210 in N/A 70 N/A 24.77 mm0.975 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -318 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-319 EP-70 N/A
190718 		N/A N/A N/A 0.210 in N/A 70 N/A 26.34 mm1.037 in N/A 0.005 in0.12 mm N/A 0.010 in0.25 mm N/A -319 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-320 EP-70 N/A
190719 		N/A N/A N/A 0.210 in N/A 70 N/A 27.94 mm1.100 in N/A 0.005 in0.12 mm N/A 0.012 in0.30 mm N/A -320 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
-321 EP-70 N/A
190720 		N/A N/A N/A 0.210 in N/A 70 N/A 29.51 mm1.162 in N/A 0.005 in0.12 mm N/A 0.012 in0.30 mm N/A -321 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.v
-322 EP-70 N/A
190721 		N/A N/A N/A 0.210 in N/A 70 N/A 31.12 mm1.225 in N/A 0.005 in0.12 mm N/A 0.012 in0.30 mm N/A -322 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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