British Standard O-Rings are very similar to Standard O-Rings in the fact that they are both standardized imperically. The British Standard however, incorporates some extended sizes in the 1/4" nominal cross section group for an even broader application range. British Standard O-Rings serve a variety of industries including aerospace, paint, food, and chemical transport. 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.

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Inside Diamter (in)

Inside Diamter (mm)

Cross Section Width (in)

Cross Section Width (mm)

Item #

Inside Diamter

Cross Section Width

Durometer

CSW Tolerance

BS Number

BS460 EP-70 N/A 15.475 in393.07 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -460
BS459 EP-70 N/A 14.9751 in380.37 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -459
BS458 EP-70 N/A 14.475 in367.67 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -458
BS457 EP-70 N/A 13.9751 in354.97 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -457
BS456 EP-70 N/A 13.475 in342.27 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -456
BS455 EP-70 N/A 12.975 in329.57 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -455
BS454 EP-70 N/A 12.475 in316.87 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -454
BS453 EP-70 N/A 11.975 in304.17 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -453
BS452 EP-70 N/A 11.475 in291.47 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -452
BS451 EP-70 N/A 10.975 in278.77 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -451
BS450 EP-70 N/A 10.475 in266.07 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -450
BS449 EP-70 N/A 9.975 in253.37 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -449
BS448 EP-70 N/A 9.475 in240.67 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -448
BS447 EP-70 N/A 8.975 in227.97 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -447
BS446 EP-70 N/A 8.475 in215.27 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -446
BS445 EP-70 N/A 7.975 in202.57 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -445
BS444 EP-70 N/A 7.725 in196.22 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -444
BS443 EP-70 N/A 7.475 in189.87 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -443
BS442 EP-70 N/A 7.225 in183.52 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -442
BS441 EP-70 N/A 6.975 in177.17 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -441
BS440 EP-70 N/A 6.725 in170.82 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -440
BS439 EP-70 N/A 6.475 in164.47 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -439
BS438 EP-70 N/A 6.225 in158.12 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -438
BS437 EP-70 N/A 5.975 in151.77 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -437
BS436 EP-70 N/A 5.850 in148.59 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -436
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