O-ring 40x3 mm NBR

O-ring 40x3 mm NBR 70 ShA - Oil-Resistant Nitrile Rubber Seal

The O-ring 40x3 mm NBR 70Sh is a robust sealing ring made from nitrile butadiene rubber (NBR) with a hardness of 70 Shore A. This standard elastomer is ideal for sealing static and dynamic systems exposed to oils, fuels, and various chemicals in industrial and automotive applications.

Technical Specifications:

• Inner Diameter (ID): 40 mm

• Cross-section (CS): 3 mm

• Material: NBR (Nitrile Butadiene Rubber)

• Hardness: 70 ShA (Shore A)

• Color: Black

• Temperature Range: -30°C to +100°C

• Compliance: DIN 3771 standard

Key Features and Benefits:

• Excellent resistance to mineral oils, fuels, and hydraulic fluids

• Ideal elasticity and compression recovery

• Good abrasion and aging resistance

• Suitable for static and light dynamic applications

• Compliant with industry-standard sealing requirements

• Cost-effective and easy to install

Typical Applications:

• Hydraulic and pneumatic systems

• Automotive industry

• Mechanical and industrial machinery

• Sealing joints in pumps, valves, compressors

• Domestic appliances and fuel systems

Frequently Asked Questions (FAQ)

Q1: What does “70 ShA” mean?
It refers to the Shore A hardness scale. 70 ShA indicates medium hardness, balancing flexibility and sealing performance.

Q2: Is this O-ring compatible with oil and fuel?
Yes, NBR is especially resistant to oils, greases, and petroleum-based fluids.

Q3: Can I use this O-ring at high temperatures?
This O-ring works best between -30°C and +100°C. For higher temperatures, consider FKM/Viton alternatives.

Q4: Do you offer bulk orders for industrial clients?
Yes! We provide wholesale pricing and quick dispatch for B2B customers. Contact our team for an offer.