BS425 to BS475

BS425 to BS475

Imperial / Inch sizes of Nitrile (NBR, Buna N) O-rings.  These sizes are usually looked up by a size code e.g. BS435 or AS435.  The size codes are as follows:

Size code O-ring cross section
-425 to -475 6.99


​Remember to check media compatibility using our Chemical Compatibility Guide.

More information:
O-ring material data sheet - Nitrile 70
O-ring Housing dimensions
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Article No. OD ID CS Ref. Material
  Price breaks
Each  
QTY ADD
BS425-N70 127.65 113.67 6.99 425 Nitrile 70 1+ 5+ 10+ 20+ 50+ 100+ MORE
£1.70 £0.50 £0.35 £0.28 £0.26 £0.24 CALL
BS426-N70 130.82 116.84 6.99 426 Nitrile 70 1+ 5+ 10+ 20+ 50+ 100+ MORE
£1.71 £0.51 £0.36 £0.29 £0.27 £0.25 CALL
BS427-N70 134 120.02 6.99 427 Nitrile 70 1+ 5+ 10+ 20+ 50+ 100+ MORE
£1.71 £0.51 £0.36 £0.29 £0.27 £0.25 CALL
BS428-N70 137.17 123.19 6.99 428 Nitrile 70 1+ 5+ 10+ 20+ 50+ 100+ MORE
£1.73 £0.53 £0.38 £0.31 £0.29 £0.27 CALL
BS429-N70 140.35 126.37 6.99 429 Nitrile 70 1+ 5+ 10+ 20+ 50+ 100+ MORE
£1.76 £0.56 £0.41 £0.34 £0.32 £0.30 CALL
BS430-N70 143.52 129.54 6.99 430 Nitrile 70 1+ 5+ 10+ 20+ 50+ MORE
£1.76 £0.56 £0.41 £0.34 £0.32 CALL
BS431-N70 146.7 132.72 6.99 431 Nitrile 70 1+ 5+ 10+ 20+ 50+ MORE
£1.76 £0.56 £0.41 £0.34 £0.32 CALL
BS432-N70 149.87 135.89 6.99 432 Nitrile 70 1+ 5+ 10+ 20+ 50+ MORE
£1.79 £0.59 £0.44 £0.37 £0.35 CALL
BS433-N70 153.05 139.07 6.99 433 Nitrile 70 1+ 5+ 10+ 20+ 50+ MORE
£1.79 £0.59 £0.44 £0.37 £0.35 CALL
BS434-N70 156.22 142.24 6.99 434 Nitrile 70 1+ 5+ 10+ 20+ 50+ MORE
£1.79 £0.59 £0.44 £0.37 £0.35 CALL
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