O-Rings
Buna-N, Viton, silicone and EPDM O-rings by AS568 dash number.
Also searched as: o ringsas568viton o ringbuna nnitrile o ring
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NBR Nitrile O Ring 90 Shore a
Hardness: 90 Shore a
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NBR O-Ring, AS568-014, Hs90 Hardness
AS568 Dash Number: 014Hardness: Hs90
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NBR Sealing O-Ring Nitrile CS5.3mm, 63mm to 80mm
Size Range: 63-80 mmThickness: 5.3 mm
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Nitrile 'O' Ring, 1 in. OD x 3/4 in. ID x 1/8 in. Thickness
Inner Diameter: 3/4 inOutside Diameter: 1 inThickness: 1/8 in
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Nitrile 'O' Ring, 3/8 in. OD x 1/4 in. ID x 1/16 in. Thickness
Inner Diameter: 1/4 inOutside Diameter: 3/8 inThickness: 1/16 in
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Nitrile (Buna-N) O-Ring Kit – 70 Duro Black, 382 Pcs in 30 AS568 Sizes
AS568 Dash Number: 30 SizesDurometer: 70Quantity: 382
from $54.25Amazon $54.25 -
Nitrile (NBR) O-Ring, AS568-451, 70 Durometer
AS568 Dash Number: 451Durometer: 70Inner Diameter: 11 inch
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Nitrile Buna 70 Duro Black O-Ring, AS568-150
AS568 Dash Number: 158Color: BlackDurometer: 70 Shore A
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Nitrile Buna O-Ring AS568-333
AS568 Dash Number: 333Durometer: 70 Duro
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Nitrile Buna O-Ring AS568-904
AS568 Dash Number: 904Durometer: 90 Duro
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Nitrile O-Ring 6mm thickness, OD 50-95mm
Outer Diameter: 50-95 mmQuantity: 50 PcsThickness: 6 mm
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Nitrile O-Ring, 7/16 in. x 9/16 in. x 1/16 in.
Inner Diameter: 7/16 inOutside Diameter: 9/16 inThickness: 1/16 in
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Nitrile O-Ring, 9/16 in. O.D x 3/8 in. I.D x 3/32 in. Thickness
Inner Diameter: 3/8 inOutside Diameter: 9/16 inThickness: 3/32 in
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Nitrile O-Ring, AS568-124, 70 Duro
AS568 Dash Number: 124Durometer: 70
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Nitrile Rubber O-Ring 185mm x 195mm x 5mm
Inner Diameter: 185 mmOuter Diameter: 195 mmThickness: 5 mm
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Nitrile Rubber O-Ring 2.4mm x 7-180mm
Outer Diameter: 7-180 mmThickness: 2.4 mm
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Nitrile Rubber O-Ring Black NBR 1.5mm thickness, 5mm-80mm OD
Outer Diameter: 5-80 mmThickness: 1.5 mm
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Nitrile Rubber O-Ring, 14mm OD, 8mm ID
Inner Diameter: 8 mmOutside Diameter: 14 mm
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Nitrile Rubber O-Ring, 20mm Inner Diameter
Inner Diameter: 20 mm
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Nitrile Rubber O-Ring, 21mm OD 15mm ID 3mm
Inner Diameter: 15 mmOutside Diameter: 21 mmThickness: 3 mm
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Nitrile Rubber O-Ring, 22mm OD x 18mm ID x 2mm
Inner Diameter: 18 mmOutside Diameter: 22 mmThickness: 2 mm
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Nitrile Rubber O-Ring, 3.1mm Width, Metric
Width: 3.1 mm
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Nitrile Rubber O-Ring, 30mm Inner Diameter
Inner Diameter: 30 mm
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Nitrile Rubber O-Ring, 38mm OD 35mm ID 1.5mm
Inner Diameter: 35 mmOutside Diameter: 38 mmThickness: 1.5 mm
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Nitrile Rubber O-Ring, AS568, 52.07mm ID, 2.62mm CS
AS568 Dash Number: NoneCross Section: 2.62 mmInner Diameter: 52.07 mm
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Nitrilo NBR Buna-N O-Ring
Durometer: 70 Shore A, 90 Shore A
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O-RING
Dash Number: 014Durometer: 90
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O-Ring
Cross Section: 1/4"Inner Diameter: 6-1/2"Outer Diameter: 7"
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O-Ring
Dash Number: 371Inside Diameter: 8-1/2 inchOutside Diameter: 8-7/8 inchThickness: 3/16 inch
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O-Ring
Dash Number: 110Inside Diameter: 0.3620 inchOutside Diameter: 0.5680 inchThickness: 0.1030 inch
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O-Ring
Dash Number: 006Inside Diameter: 0.1140 inchOutside Diameter: 0.2540 inchThickness: 0.0700 inch
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O-Ring
Dash Number: 246Inside Diameter: 4-1/2 "Outside Diameter: 4-3/4 "Thickness: 1/8 "
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O-Ring
Dash Number: 117Inside Diameter: 0.7990 "Maximum Working Temperature: 450.000 FMinimum Working Temperature: -15 FOutside Diameter: 1.0050 "
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O-Ring
AS568 Dash Number: 114Color: BlackDurometer: 70 Duro
About o-rings
O-rings are toroidal seals, typically circular in cross-section, designed to be seated in a groove and compressed during assembly to create a seal between two or more parts. They are critical components in static and dynamic sealing applications across various industries, preventing leakage of fluids or gases. Selection is primarily driven by the application's operating conditions, including temperature, pressure, and chemical compatibility. Standardized dimensions are defined by specifications such as AS568, which specifies inside diameter, cross-sectional diameter, and corresponding dash numbers. Common materials include Buna-N (nitrile) for general-purpose applications with good oil and solvent resistance, Viton (FKM) for high-temperature and aggressive chemical environments, silicone for extreme temperature flexibility and medical applications, and EPDM for excellent resistance to steam, hot water, and brake fluids. Material choice significantly impacts performance characteristics like durometer (hardness), tensile strength, and compression set. The correct O-ring ensures long-term sealing integrity and system reliability.
How to choose
Selecting an O-ring involves a sequential decision process. First, identify the chemical compatibility requirements based on the fluid or gas being sealed; this dictates the base polymer (e.g., Buna-N, Viton, EPDM, Silicone). Second, determine the operating temperature range to ensure the chosen material maintains its sealing properties without degradation or embrittlement. Third, consider the pressure differential across the seal; for high-pressure applications, consider backup rings or harder durometer O-rings to prevent extrusion. Fourth, specify the required dimensions, typically by AS568 dash number, which defines the inside diameter and cross-section. Finally, assess whether the application is static or dynamic, as dynamic seals require materials with lower friction and higher abrasion resistance.