• AS568-103 O-Ring dimensions: ID 0.081 in, CS 0.103 in, OD 0.287 in
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Royal Way

AS568-103 O-Ring – 0.081 in ID × 0.103 in CS | NBR, HNBR & FKM

AS568-103 O-Ring – 0.081 in ID × 0.103 in CS | NBR, HNBR & FKM
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Material and Hardness
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Read the AS568 O-Ring Size & Gland Selection Guide

AS568-103 O-Ring – 0.081 in ID × 0.103 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: AS568-103
  • Inside diameter (ID): 0.081 in / 2.06 mm
  • Cross section (CS): 0.103 in / 2.62 mm
  • Outside diameter (OD): 0.287 in / 7.29 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 AS568-103. Depending on the equipment design, this series is commonly encountered in compatible pumps, valves, hydraulic controls and oilfield service-tool glands.

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 improved heat, abrasion, aging and mechanical resistance are required. Sour gas / H2S and rapid-gas-decompression service require compound-specific qualification for the actual gas composition, pressure, temperature and decompression rate.

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.

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