O-Ring 6.5x4 mm NBR

Main Description

Presenting the O-Ring 6.5x4 mm NBR 70 (Pack of 1000) — an industrial-grade nitrile rubber sealing ring crafted for robust performance in hydraulic, pneumatic, and static sealing applications. With an internal diameter of 6.5 mm and cross-section thickness of 4 mm, this NBR O-Ring is engineered for tight, reliable sealing as a rubber gasket or static seal in a variety of systems.

Applications & Use Cases

This sealing ring is versatile and finds application in:

• Hydraulic and pneumatic systems (valves, couplings, piston rods)

• Industrial machinery, pumps, compressors, control units

• Static flanges, covers, housings, cartridge assemblies

• OEM production, maintenance, and service operations

• Situations demanding sealing against oils, lubricants, fuels

Because it comes as a pack of 1000 pcs, it’s particularly suited for OEM buyers, spare part inventories, and businesses needing consistent batch supply of sealing rings.

Key Benefits & Material Characteristics

• Durable industrial sealing: NBR (nitrile rubber / Buna-N) is well-known for its strength and sealing reliability in oil-rich environments.

• Oil and chemical resistance: Resists mineral oils, hydraulic fluids, greases, light fuels, and other petroleum-based media.

• Mechanical stability: Holds shape under pressure cycling, moderate compression, and temperature variation.

• Optimal durometer: 70 Shore A delivers balance between flexibility and wear resistance.

• Precision manufacturing: Uniform dimensions and surface finish reduce leakage risk and ease integration.

• High-volume packaging: 1000 pcs pack ensures cost efficiency and logistical convenience.

Technical Specifications & Selection Advice

• Inner Diameter (ID): 6.5 mm

• Cross-Section / Thickness (CS): 4.0 mm

• Material: NBR (nitrile rubber), 70 Shore A

• Temperature Range: -30 °C to +100 °C (short-term tolerance up to +120 °C)

• Fluid Compatibility: Mineral oils, lubricants, greases, fuels

• Quantity: 1000 pieces per pack

• Intended Use: static or low-motion sealing in industrial systems

Selection Tips:

1. Confirm mating surface tolerances, surface finish, and compression to ensure proper seal.

2. Assess operating temperature and chemical exposure—if extremes or aggressive fluids are present, consider FKM (Viton) or other elastomers.

3. For dynamic sealing (fast sliding or rotation), choose specialized dynamic seals or higher performance compounds.

4. Use proper lubrication during installation to avoid damaging the sealing lip.

By weaving in effective search terms such as O-Ring 6.5x4 NBR, nitrile rubber sealing ring, 1000 pcs NBR O-Ring, industrial sealing, hydraulic/pneumatic O-Ring, static seal ring, this description is better positioned to capture global search traffic.

FAQ

Q1: What does “70 Shore A” mean for an O-Ring?
It refers to the hardness of the material (Shore A scale). 70 indicates a medium-hard elastomer — firm, yet flexible — widely used in sealing applications.

Q2: Is this O-Ring safe for oil, grease, and fuel contact?
Yes. NBR has excellent compatibility with mineral oils, greases, lubricants, and light fuels, making it a standard choice in hydraulic and mechanical systems.

Q3: Can this O-Ring be used in high-temperature applications?
Typically, NBR works well up to +100 °C; in some cases it tolerates short-term spikes to +120 °C. For sustained high temperatures, consider alternative materials such as FKM/Viton.

Q4: Is this product suitable for dynamic sealing (sliding, rotary)?
Primarily designed for static or low-motion sealing. For high-speed sliding or rotation, specialized dynamic seals or elastomer materials should be used.

Q5: What is your delivery time and stock status?
We maintain stock at our Lublin warehouse (Smoluchowskiego 1, building 4). Orders are dispatched within 24h, domestically and internationally.