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.

This elastomer is a copolymer of Tetrafluoroethylene (TFE) and propylene. Its chemical resistance is excellent across a wide range of aggressive media.For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Unit of Measure

Type

N/A BS Standard O-Ring

Material

N/A Aflas

Cross Section Width

N/A 0.139 in3.53 mm

Durometer

N/A 75

Inside Diameter

N/A 2.44 in61.90 mm

CSW Tolerance

N/A 0.004 in0.10 mm

BS Number

N/A -838

Warning

N/A Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

O-Ring Industries

N/A O-rings are used in the military, automotive, aerospace and agriculture industries.