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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. Neoprene is also known as Chloroprene.

Neoprene resists fats, oils and petroleum products. Stands up well in sunlight. Low flammability - burns when exposed to flames, but self-extinguishes when flame is removed. Generally good ozone, aging and chemical resistance. It has good mechanical properties over a wide temperature range. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

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O-Ring Industries

Quantity
BS6 C-70 N/A
183717
N/A BS Standard O-Ring N/A Neoprene N/A 0.070 in1.78 mm N/A 70 N/A 0.114 in2.90 mm N/A 0.003 in0.08 mm N/A -006 N/A N/A O-rings are used in the military defense and agriculture industries.
BS5 C-70 N/A
183718
N/A BS Standard O-Ring N/A Neoprene N/A 0.070 in1.78 mm N/A 70 N/A 0.101 in2.57 mm N/A 0.003 in0.08 mm N/A -005 N/A N/A O-rings are used in the military defense and agriculture industries.
BS4 C-70 N/A
183719
N/A BS Standard O-Ring N/A Neoprene N/A 0.070 in1.78 mm N/A 70 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -004 N/A N/A O-rings are used in the military defense and agriculture industries.
BS3 C-70 N/A
183720
N/A BS Standard O-Ring N/A Neoprene N/A 0.060 in1.52 mm N/A 70 N/A 0.056 in1.42 mm N/A 0.003 in0.08 mm N/A -003 N/A N/A O-rings are used in the military defense and agriculture industries.
BS2 C-70 N/A
183721
N/A BS Standard O-Ring N/A Neoprene N/A 0.050 in1.27 mm N/A 70 N/A 0.042 in1.07 mm N/A 0.003 in0.08 mm N/A -002 N/A N/A O-rings are used in the military defense and agriculture industries.
BS445A C-70 N/A
183722
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 8.225 in208.92 mm N/A 0.006 in0.15 mm N/A -445A N/A N/A O-rings are used in the military defense and agriculture industries.
BS446A C-70 N/A
183723
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 8.725 in221.62 mm N/A 0.006 in0.15 mm N/A -446A N/A N/A O-rings are used in the military defense and agriculture industries.
BS447A C-70 N/A
183724
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 9.225 in234.32 mm N/A 0.006 in0.15 mm N/A -447A N/A N/A O-rings are used in the military defense and agriculture industries.v
BS448A C-70 N/A
183725
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 9.725 in247.02 mm N/A 0.006 in0.15 mm N/A -448A N/A N/A O-rings are used in the military defense and agriculture industries.
BS449A C-70 N/A
183726
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 10.225 in259.72 mm N/A 0.006 in0.15 mm N/A -449A N/A N/A O-rings are used in the military defense and agriculture industries.
BS450A C-70 N/A
183727
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 10.725 in272.42 mm N/A 0.006 in0.15 mm N/A -450A N/A N/A O-rings are used in the military defense and agriculture industries.
BS451A C-70 N/A
183728
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 11.225 in285.12 mm N/A 0.006 in0.15 mm N/A -451A N/A N/A O-rings are used in the military defense and agriculture industries.
BS452A C-70 N/A
183729
N/A BS Standard O-Ring N/A Neoprene N/A 0.275 in6.99 mm N/A 70 N/A 11.725 in297.82 mm N/A 0.006 in0.15 mm N/A -452A N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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