3.1 mm Cross Section Polyurethane O-Rings

Due to the wide range of sizes, colors are shipped at random based on available stock. Available colors include red, natural, translucent, black, blue, green, and yellow. If you have any questions or color preferences, please contact the seller before placing your order.

Product Overview

Polyurethane O-Rings with a 3.1 mm cross section are designed for industrial sealing applications requiring high durability, excellent wear resistance and reliable performance under mechanical stress.

Made from high-quality polyurethane (PU), these sealing rings provide superior abrasion resistance, high tensile strength and excellent resistance to extrusion compared with conventional rubber O-rings. They are suitable for both static and dynamic sealing applications in hydraulic, pneumatic and industrial equipment.

Size Selection

Select size by:

Inside Diameter (ID) × Cross Section (CS)

Example:

(OD = ID + 2 × CS)

Key Features

• 3.1 mm cross section for medium-size sealing applications
• High wear and abrasion resistance
• Excellent tensile strength and tear resistance
• Good extrusion resistance under pressure
• Suitable for dynamic reciprocating sealing
• Long service life in demanding environments
• Available in standard and custom sizes

Specifications

• Material: Polyurethane (PU)
• Cross Section: 3.1 mm
• Hardness: 70A / 80A / 90A / 95A (optional)
• Color: Red, Natural, Translucent, Black, Bue, Green or Custom
• Working Temperature: -40°C to +90°C (depending on grade)
• Application: Dynamic and static sealing

Applications

3.1 mm cross section polyurethane O-rings are commonly used in:

• Hydraulic cylinders
• Pneumatic systems
• Industrial machinery
• Automotive sealing components
• Pumps and valves
• Automation equipment
• Mechanical assemblies

Why Choose Polyurethane O-Rings?

Compared with NBR and silicone O-rings, polyurethane provides:

• Higher abrasion resistance than standard rubber O-rings
• Better mechanical strength
• Improved resistance to wear and extrusion
• Longer service life in dynamic applications

Related Sizes

Looking for another cross section?

• 1 mm Cross Section Polyurethane O-Rings
• 1.5 mm Cross Section Polyurethane O-Rings
• 1.78 mm Cross Section Polyurethane O-Rings
• 1.8 mm Cross Section Polyurethane O-Rings
• 1.9 mm Cross Section Polyurethane O-Rings
• 2 mm Cross Section Polyurethane O-Rings
• 2.4 mm Cross Section Polyurethane O-Rings
• 2.5 mm Cross Section Polyurethane O-Rings
• 2.65 mm Cross Section Polyurethane O-Rings
• 3.1 mm Cross Section Polyurethane O-Rings
• 3.5 mm Cross Section Polyurethane O-Rings
• 4 mm Cross Section Polyurethane O-Rings