An O-ring is a circular, doughnut-shaped mechanical sealing device made of elastomer material, such as rubber or silicone. It creates a reliable seal between two mating surfaces, preventing the leakage of fluids or gases.

Features and benefits:
  • Versatility
  • Effective sealing
  • Cost-effectiveness
Item Code Bore Diameter Outside Diameter Small Taper Outside Diameter Lock Nut Width Width Lock Nut Width Lock Nut Including Lock Washer Mass
d1 d d3 B1 B B4 m
mm kg

Mining & Construction
Oil & Gas
Pumps & Compressors
Oil & Gas
Food Processing Machinery
Home Appliances


Q: How are O-rings sized?

O-rings are typically sized based on their inside diameter (ID) and cross-sectional diameter (CS). For example, an O-ring with an ID of 10 mm and a CS of 2 mm would be specified as 10x2 mm.

Q: Can O-rings be used in dynamic applications?

Yes, O-rings can be used in dynamic applications where there is relative motion between parts. However, the design must account for factors such as friction and wear to ensure longevity.

Q: Are O-rings reusable?

O-rings are generally not reusable once they have been compressed and used for sealing. After compression, the O-ring may lose some of its original properties, affecting its sealing performance. It is recommended to replace O-rings with new ones when reassembling the components.

o ring