• AS568-928 O-Ring Boss Seal – 2.090 in ID × 0.118 in CS – dimensional diagram showing ID, OD and cross-section
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Royal Way

AS568-928 O-Ring Boss Seal – 2.090 in ID × 0.118 in CS | NBR, HNBR & FKM

AS568-928 O-Ring Boss Seal – 2.090 in ID × 0.118 in CS | NBR, HNBR & FKM

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Material & Hardness

AS568-928 O-Ring Boss Seal – 2.090 in ID × 0.118 in CS | NBR, HNBR & FKM

Royal Way supplies this standard AS568 size in NBR (Buna-N), HNBR (HSN) and FKM (Viton-type), with 70 and 90 Shore A options for maintenance, repair and production requirements.

Size Specifications

  • AS568 size: AS568-928
  • Inside diameter (ID): 2.090 in / 53.09 mm
  • Cross section (CS): 0.118 in / 3.00 mm
  • Outside diameter (OD): 2.326 in / 59.08 mm

Material and Hardness Options

  • NBR / Buna-N: commonly selected for petroleum oils and compatible hydraulic fluids
  • HNBR / HSN: improved heat, ozone, aging and mechanical resistance compared with standard NBR
  • FKM / Viton-type: selected for higher-temperature service and broader fluid compatibility
  • 70 Shore A: general sealing flexibility and conformity
  • 90 Shore A: greater extrusion resistance for suitable higher-pressure clearances

Typical Use

Designed for equipment whose gland or groove is specified for AS568-928. Depending on the equipment design, this series is commonly encountered in straight-thread O-ring boss fittings used in hydraulic and fluid-power connections.

Typical Fitting Application

The AS568 900 series is intended for straight-thread tube-fitting boss gasket applications. Match the exact fitting thread and boss standard, groove dimensions, compound and pressure requirements before ordering.

Ordering and Fit Verification

An AS568 dash number defines size, not universal equipment compatibility. Confirm groove dimensions, squeeze, stretch, clearance, pressure, temperature, fluid compatibility and backup-ring requirements before ordering or installation.

Material Options

Available materials include Buna-N / NBR, HSN / HNBR, and FKM / Viton®-type compounds.

Buna-N / NBR is the most common material for general oilfield O-rings and sealing rings. It is suitable for oil, water, drilling fluid, and standard industrial sealing applications.

HSN / HNBR is used when better heat, abrasion, aging, and sour gas / H2S resistance is required. It is commonly selected for more demanding oilfield service.

FKM / Viton®-type provides better high-temperature and chemical resistance for selected oils, fuels, and chemical media.

Standard hardness is usually 90 Shore A unless otherwise specified. Please confirm size, hardness, material, groove dimensions, and service conditions before ordering.

Applications

Used for oilfield O-ring and sealing ring applications, including FIG 206 sealing rings, flowline equipment, repair kits, valve service, pressure pumping equipment, well service tools, and general industrial sealing applications.

Bulk Order & Custom Quote

Standard AS568 sizes can be ordered online. For carton quantities, custom materials, special hardness, non-standard sizes, private labeling, or custom packaging, please send us the size, material, hardness, application, and quantity.

Compatibility Notice

AS568 sizes, FIG references, and equipment names are used for size and compatibility reference only.

Please confirm final fit against groove dimensions, equipment drawings, material requirements, and service conditions before ordering.

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Bulk O-Rings and Sealing Rings

Standard AS568 sizes can be ordered online. For carton quantities, custom materials, special hardness or non-standard sizes, please send us the size, material, hardness, application and quantity.

Bulk packaging and private labeling are available upon request.

Request Bulk Quote