Viton® Back-Up Rings FKM 90 BS309 to BS395

£0.6392£67.6886

Back-up rings should generally be used for dynamic applications over 100 bar, and static applications around 950 bar. Each application can vary, therefore it is essential to use this as a general guideline only

Traditionally PTFE has been used but in recent years, contoured elastomer rings have been developed and are now widely used. Eastern Seals supplies a wide range of back-up ring profiles and materials to complement each seal type and to suit every application. We hold large stocks of Contoured rings in both Nitrile and Viton®.

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Product Information

  Back-Up Rings
ES RefSize
Price per unit
1 - 100101 - 250251 - 500501 - 10001001 - *
Quantity
BS309BUCOV9010.46X5.33MM
£0.6392£0.5625£0.4858£0.4155£0.3516

Available on backorder

BS310BUCOV9012.07X5.33MM
£0.6776£0.5963£0.5150£0.4404£0.3727

Available on backorder

BS311BUCOV9013.64X5.33MM
£0.7096£0.6244£0.5393£0.4612£0.3903

Available on backorder

BS312BUCOV9015.24X5.33MM
£0.7863£0.6919£0.5976£0.5111£0.4325

Available on backorder

BS313BUCOV9016.81X5.33MM
£0.8508£0.7487£0.6466£0.5530£0.4679

Available on backorder

BS314BUCOV9018.42X5.33MM
£0.9117£0.8023£0.6929£0.5926£0.5014

Available on backorder

BS315BUCOV9019.99X5.33MM
£0.9773£0.8600£0.7427£0.6352£0.5375

Available on backorder

BS316BUCOV9021.59X5.33MM
£1.0483£0.9225£0.7967£0.6814£0.5766

Available on backorder

BS317BUCOV9023.16X5.33MM
£1.0914£0.9604£0.8295£0.7094£0.6003

Available on backorder

BS318BUCOV9024.77X5.33MM
£1.1578£1.0189£0.8799£0.7526£0.6368

Available on backorder

BS319BUCOV9026.34X5.33MM
£1.2233£1.0765£0.9297£0.7951£0.6728

Available on backorder

BS320BUCOV9027.94X5.33MM
£1.3103£1.1531£0.9958£0.8517£0.7207

Available on backorder

BS321BUCOV9029.51X5.33MM
£1.3975£1.2298£1.0621£0.9084£0.7686

Available on backorder

BS322BUCOV9031.12X5.33MM
£1.4854£1.3072£1.1289£0.9655£0.8170

100 in stock (can be backordered)

BS323BUCOV9032.69X5.33MM
£1.5715£1.3829£1.1943£1.0215£0.8643

1100 in stock (can be backordered)

BS324BUCOV9034.29X5.33MM
£1.6379£1.4414£1.2448£1.0646£0.9008

220 in stock (can be backordered)

BS325BUCOV9037.47X5.33MM
£1.7465£1.5369£1.3273£1.1352£0.9606

Available on backorder

BS326BUCOV9040.64X5.33M
£1.8560£1.6333£1.4106£1.2064£1.0208

85 in stock (can be backordered)

BS327BUCOV9043.82X5.33MM
£1.9657£1.7298£1.4939£1.2777£1.0811

10 in stock (can be backordered)

BS328BUCOV9046.99X5.33MM
£2.0741£1.8252£1.5763£1.3482£1.1408

150 in stock (can be backordered)

BS329BUCOV9050.17X5.33MM
£2.1836£1.9216£1.6595£1.4193£1.2010

78 in stock (can be backordered)

BS330BUCOV9053.34X5.33MM
£2.2922£2.0171£1.7421£1.4899£1.2607

147 in stock (can be backordered)

BS331BUCOV9056.52X5.33MM
£2.4017£2.1135£1.8253£1.5611£1.3209

98 in stock (can be backordered)

BS332BUCOV9059.69X5.33MM
£2.5328£2.2289£1.9249£1.6463£1.3930

120 in stock (can be backordered)

BS333BUCOV9062.87X5.33MM
£2.7518£2.4216£2.0914£1.7887£1.5135

4 in stock (can be backordered)

BS334BUCOV9066.04X5.33MM
£2.8390£2.4983£2.1576£1.8454£1.5615

251 in stock (can be backordered)

BS335BUCOV9069.22X5.33MM
£2.9474£2.5937£2.2400£1.9158£1.6211

100 in stock (can be backordered)

BS336BUCOV9072.39X5.33MM
£3.0571£2.6902£2.3234£1.9871£1.6814

52 in stock (can be backordered)

BS337BUCOV9075.57X5.33MM
£3.1665£2.7865£2.4065£2.0582£1.7416

42 in stock (can be backordered)

BS338BUCOV9078.74X5.33MM
£3.2750£2.8820£2.4890£2.1288£1.8013

Available on backorder

BS339BUCOV9081.92X5.33MM
£3.3846£2.9784£2.5723£2.2000£1.8615

60 in stock (can be backordered)

BS340BUCOV9085.09X5.33MM
£3.4931£3.0739£2.6548£2.2705£1.9212

72 in stock (can be backordered)

BS341BUCOV9088.27X5.33MM
£3.6027£3.1704£2.7381£2.3418£1.9815

6 in stock (can be backordered)

BS342BUCOV9091.44X5.33MM
£3.7122£3.2667£2.8213£2.4129£2.0417

40 in stock (can be backordered)

BS343BUCOV9094.62X5.33MM
£3.8207£3.3622£2.9037£2.4835£2.1014

Available on backorder

BS344BUCOV9097.79X5.33MM
£3.9303£3.4587£2.9870£2.5547£2.1617

39 in stock (can be backordered)

BS345BUCOV90100.97X5.33MM
£4.1484£3.6506£3.1528£2.6965£2.2816

67 in stock (can be backordered)

BS346BUCOV90104.14X5.33MM
£4.3674£3.8433£3.3192£2.8388£2.4021

36 in stock (can be backordered)

BS347BUCOV90107.32X5.33MM
£4.6950£4.1316£3.5682£3.0518£2.5823

50 in stock (can be backordered)

BS348BUCOV90110.49X5.3MM
£5.0768£4.4676£3.8584£3.2999£2.7922

51 in stock (can be backordered)

BS349BUCOV90113.67X5.33MM
£5.4045£4.7560£4.1074£3.5129£2.9725

150 in stock (can be backordered)

BS350BUCOV90116.84X5.33MM
£5.7321£5.0442£4.3564£3.7259£3.1527

168 in stock (can be backordered)

BS351BUCOV90120.02X5.33MM
£6.1682£5.4280£4.6878£4.0093£3.3925

110 in stock (can be backordered)

BS352BUCOV90123.2X5.33MM
£6.4959£5.7164£4.9369£4.2223£3.5727

41 in stock (can be backordered)

BS353BUCOV90126.37X5.33MM
£6.8777£6.0524£5.2271£4.4705£3.7827

15 in stock (can be backordered)

BS354BUCOV90129.54X5.33MM
£7.0967£6.2451£5.3935£4.6129£3.9032

264 in stock (can be backordered)

BS355BUCOV90137.72X5.33MM
£7.3692£6.4849£5.6006£4.7900£4.0531

30 in stock (can be backordered)

BS356BUCOV90135.89X5.33MM
£7.7510£6.8209£5.8908£5.0382£4.2631

Available on backorder

BS357BUCOV90139.07X5.33MM
£8.0244£7.0615£6.0985£5.2159£4.4134

200 in stock (can be backordered)

BS358BUCOV90142.24X5.33MM
£8.4062£7.3975£6.3887£5.4640£4.6234

40 in stock (can be backordered)

BS359BUCOV90145.42X5.33MM
£8.7338£7.6857£6.6377£5.6770£4.8036

135 in stock (can be backordered)

BS360BUCOV90148.59X5.33MM
£9.0613£7.9739£6.8866£5.8898£4.9837

62 in stock (can be backordered)

BS361BUCOV90151.77X5.33MM
£9.3347£8.2145£7.0944£6.0676£5.1341

450 in stock (can be backordered)

BS362BUCOV90158.12X5.33MM
£9.5528£8.4065£7.2601£6.2093£5.2540

307 in stock (can be backordered)

BS363BUCOV90164.47X5.33MM
£10.2080£8.9830£7.7581£6.6352£5.6144

181 in stock (can be backordered)

BS364BUCOV90170.82X5.33MM
£10.4805£9.2228£7.9652£6.8123£5.7643

95 in stock (can be backordered)

BS365BUCOV90177.17X5.33MM
£10.9175£9.6074£8.2973£7.0964£6.0046

62 in stock (can be backordered)

BS366BUCOV90183.52X5.33MM
£11.1356£9.7993£8.4631£7.2381£6.1246

20 in stock (can be backordered)

BS367BUCOV90189.87X5.33MM
£11.4632£10.0876£8.7120£7.4511£6.3048

60 in stock (can be backordered)

BS368BUCOV90196.22X5.33MM
£12.0089£10.5678£9.1268£7.8058£6.6049

141 in stock (can be backordered)

BS369BUCOV90202.57X5.33MM
£12.2279£10.7606£9.2932£7.9481£6.7253

50 in stock (can be backordered)

BS370BUCOV90208.92X5.33MM
£12.6641£11.1444£9.6247£8.2317£6.9653

179 in stock (can be backordered)

BS371BUCOV215.27X5.33MM
£13.5374£11.9129£10.2884£8.7993£7.4456

Available on backorder

BS372BUCOV90221.62X5.33MM
£14.1925£12.4894£10.7863£9.2251£7.8059

12 in stock (can be backordered)

BS373BUCOV90227.97X5.33MM
£15.7323£13.8444£11.9565£10.2260£8.6528

50 in stock (can be backordered)

BS374BUCOV90234.32X5.33MM
£16.2124£14.2669£12.3214£10.5381£8.9168

136 in stock (can be backordered)

BS375BUCOV90240.67X5.33MM
£16.5728£14.5841£12.5953£10.7723£9.1150

Available on backorder

BS376BUCOV90247.02X5.33MM
£16.9331£14.9011£12.8692£11.0065£9.3132

280 in stock (can be backordered)

BS377BUCOV90253.37X5.33MM
£19.1056£16.8129£14.5203£12.4186£10.5081

11 in stock (can be backordered)

BS378BUCOV90266.07X5.33MM
£20.4161£17.9662£15.5162£13.2705£11.2289

49 in stock (can be backordered)

BS379BUCOV90278.77X5.33MM
£21.1368£18.6004£16.0640£13.7389£11.6252

Available on backorder

BS380BUCOV90291.47X5.33MM
£21.6170£19.0230£16.4289£14.0511£11.8894

47 in stock (can be backordered)

BS381BUCOV90304.17X5.33MM
£22.3377£19.6572£16.9767£14.5195£12.2857

32 in stock (can be backordered)

BS382BUCOV90329.57X5.33MM
£25.2195£22.1932£19.1668£16.3927£13.8707

60 in stock (can be backordered)

BS383BUCOV90354.97X5.33MM
£27.6214£24.3068£20.9923£17.9539£15.1918

Available on backorder

BS384BUCOV90380.37X5.33MM
£28.8223£25.3636£21.9049£18.7345£15.8523

54 in stock (can be backordered)

BS385BUCOV90405.26X5.33MM
£30.2637£26.6321£23.0004£19.6714£16.6450

Available on backorder

BS386BUCOV90430.66X5.33MM
£31.8249£28.0059£24.1869£20.6862£17.5037

Available on backorder

BS387BUCOV90456.06X5.33MM
£33.0258£29.0627£25.0996£21.4668£18.1642

60 in stock (can be backordered)

BS388BUCOV90481.46X5.33MM
£34.9362£30.7439£26.5515£22.7085£19.2149

Available on backorder

BS389BUCOV90506.86X5.33MM
£38.2112£33.6259£29.0405£24.8373£21.0162

Available on backorder

BS390BUCOV90532.26X5.33MM
£43.6700£38.4296£33.1892£28.3855£24.0185

Available on backorder

BS391BUCOV90557.66X5.33MM
£51.8582£45.6352£39.4122£33.7078£28.5220

Available on backorder

BS392BUCOV90582.68X5.33MM
£56.7713£49.9587£43.1462£36.9013£31.2242

Available on backorder

BS393BUCOV90608.08X5.33MM
£60.0463£52.8407£45.6352£39.0301£33.0255

Available on backorder

BS394BUCOV90633.48X5.33MM
£64.4137£56.6841£48.9544£41.8689£35.4275

Available on backorder

BS395BUCOV90658.88X5.33MM
£67.6886£59.5660£51.4433£43.9976£37.2287

Available on backorder

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