O-ring 28x2.5 NBR

28x2.5 mm nitrile rubber seal, hardness 70 ShA | industrial O-ring

Overview
The O-ring 28x2.5 NBR 70 ShA is a precision sealing ring made from NBR (nitrile rubber) with a hardness of 70 Shore A. Supplied in a bulk 100 pcs pack, this product is ideal for industrial, maintenance, and OEM applications.

Key Features & Benefits

• Dimensions: Internal diameter 28 mm, cross-section 2.5 mm (profile O).

• Material: NBR (nitrile rubber), widely used in sealing applications due to its mechanical strength and chemical resistance.

• Hardness: 70 ShA — a balanced level of stiffness and flexibility.

• Chemical resistance: Good resistance to mineral oils, lubricants, fuels, hydraulic fluids — consistent with typical NBR 70 performance.

• Temperature range: Typically -30 °C to +100 °C (short exposures up to +120 °C possible, but not recommended for continuous use).

• Durability: Low compression set, good wear resistance, aging stability in standard operating conditions.

• Applications: Sealing in hydraulic systems, pneumatic systems, valves, pumps, engines, industrial machinery.

• Packaging: 100 pcs per pack — efficient inventory management and cost-effective bulk supply.

• Logistics: 📍 Warehouse & Shop: Lublin, ul. Smoluchowskiego 1, building 4 — we provide 24h delivery to minimize downtimes.

Sample sentences using key terms

• “The O-ring 28x2.5 NBR 70 ShA is often used in industrial machinery for reliable sealing in oil and fuel circuits.”

• “Our nitrile O-ring 28x2.5 in a 100 pcs pack offers consistency in spare parts management.”

• “Thanks to its oil-resistant O-ring 28x2.5 design, this seal ensures performance even when exposed to lubrication fluids.”

FAQ (Frequently Asked Questions)

1. What is the main use for O-ring 28x2.5 NBR 70 ShA?
This O-ring is designed for sealing in machinery, valves, pumps, hydraulic and pneumatic systems, especially where resistance to oils, fuels and lubricants is required.

2. What temperature range can it tolerate?
It generally works in -30 °C to +100 °C range, with occasional exposure up to +120 °C. Continuous usage above +100 °C is not advisable.

3. Is the NBR 70 material resistant to oils and fuels?
Yes — nitrile rubber (NBR) offers good resistance to mineral oils, greases, fuels, and common hydraulic fluids. However, it may not be suitable for all chemicals (e.g. strong acids, ketones).

4. Can smaller quantities than 100 pcs be ordered?
The product is standardly sold in packs of 100 pcs. For custom orders or alternative packaging, please contact our sales department.

5. How should the O-rings be stored to maintain quality?
Store in a cool, dry place, in original packaging, away from UV light, ozone, heat sources, and avoid mechanical distortion.

6. Do you offer express delivery?
Yes — we operate from 📍 Warehouse & Shop: Lublin, ul. Smoluchowskiego 1, building 4 and offer 24h delivery for fast order fulfillment.