Material
NBR (Nitrile / Buna-N)
NBR is the workhorse elastomer of the sealing industry — a copolymer of butadiene and acrylonitrile whose acrylonitrile (ACN) content is tuned to trade off oil resistance against low-temperature flexibility. Standard, medium and high-ACN grades cover the majority of mineral-oil and fuel-sealing applications at commodity cost.
NBR O-rings — the general-purpose compound.
Applications
Where it's used
Hydraulic and pneumatic seals, fuel-system O-rings, general industrial sealing, automotive fluid systems.
Available as
O-rings & products in this material
O-Ring Standard
AS568 O-Rings
AS568 (Aerospace Size Standard 568) defines the inch-based dash-numbered O-ring sizes used as the de-facto glo…
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Metric O-Rings
Metric O-rings are specified by inside diameter and cross-section in millimetres and are the default on Europe…
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O-Ring Standard
ISO 3601 O-Rings
ISO 3601-1 defines metric O-ring dimensions and tolerance classes (Class A/B) and ISO 3601-2 defines gland dim…
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Custom O-Rings
Where a standard AS568, metric or ISO 3601 size does not fit the application, FITCO produces custom O-rings to…
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