O-Ring NBR 6.5x4 mm

Main Description

The O-Ring 6.5x4 mm NBR 70 ShA (100 pcs) is a compact pack of high-quality nitrile rubber sealing rings designed for industrial, hydraulic, and pneumatic systems.
Manufactured from NBR (Nitrile Butadiene Rubber) with a hardness of 70 ShA, it offers reliable performance in oil-resistant sealing tasks — ideal for maintenance departments, workshops, and small-scale production environments.

Each rubber sealing ring features an inner diameter of 6.5 mm and a cross-section of 4.0 mm, providing excellent sealing performance in static or low-motion applications.
The NBR compound ensures high durability, chemical resistance, and stable compression recovery, making this product a trusted choice for OEM and aftermarket users alike.

While the larger 1000-piece variant suits mass production, this 100-piece pack is perfect for repair centers, assembly lines, or maintenance teams needing moderate quantities without excessive stock.

Applications

• Hydraulic and pneumatic systems (valves, cylinders, connectors)

• Pumps, compressors, control blocks, and mechanical housings

• Static sealing in industrial machines and maintenance assemblies

• Oil, grease, and fuel system sealing tasks

• Workshop or laboratory stock where compact packaging is preferred

Advantages

• High oil and grease resistance - suitable for petroleum-based fluids

• Stable mechanical properties and dimensional integrity over time

• Balanced hardness (70 ShA) - optimal blend of flexibility and strength

• Ease of installation - smooth surface finish ensures tight seating

• Compact 100 pcs pack - ideal for maintenance or limited-volume use

• Consistent quality - precise manufacturing ensures repeatable fit

Technical Data

Selection Tips:

• Verify groove dimensions and tolerances before installation.

• Apply a thin layer of compatible lubricant for easier fitting.

• For high-temperature or aggressive chemicals, consider FKM (Viton®) alternatives.

FAQ

Q1: Why choose the 100-piece version instead of a bulk pack?
This version is designed for workshops, maintenance teams, and small production runs where limited quantities are more practical and cost-efficient.

Q2: Is NBR 70 suitable for oil and grease exposure?
Yes. NBR 70 ShA provides excellent resistance to oils, greases, and petroleum-based fluids — ideal for hydraulic and pneumatic environments.

Q3: Can this O-Ring be used dynamically?
It performs best in static or low-movement applications. For fast-moving or rotary systems, use a dedicated dynamic seal.

Q4: What temperature range can it withstand?
Typically -30 °C to +100 °C, with short-term peaks up to +120 °C depending on media and pressure.

Q5: Is this item available from stock?
Yes - stocked at our warehouse in Lublin, ul. Smoluchowskiego 1, building 4.
Orders are processed with 24-hour dispatch across Poland and Europe.