NBR Nitrile O-Ring Seal Gasket CS 1.2–4mm OD 5–200mm

Ouling NBR Nitrile Rubber O-Ring Seals – Reliable Sealing for Home & Industry

Keep fluids exactly where they belong with these high-performance NBR (Nitrile Butadiene Rubber) O-Ring Seals from Ouling. Available in a wide range of cross-section diameters (CS 1.2 mm, 2 mm, and 4 mm) and outside diameters from 5 mm up to 200 mm, these standard-profile ring gaskets are engineered to deliver long-lasting, dependable sealing across countless applications — from household plumbing and air conditioning systems to industrial machinery and automotive components.

Made in Mainland China.

Why Choose These NBR O-Rings?

• Oil Resistant: NBR rubber compound stands up to petroleum-based oils, hydraulic fluids, and fuels, making it the go-to choice for oil-sealing applications.
• Waterproof Sealing: Creates a reliable watertight barrier in pipes, fittings, valves, and more — ideal for both indoor and outdoor plumbing use.
• Wear Resistant: Dense nitrile construction resists abrasion, compression set, and everyday mechanical wear for extended service life.
• Temperature Resistant: Performs consistently across a broad temperature range, suitable for both air conditioning systems and heated fluid lines.
• Wide Size Range: Outer diameters from 5 mm to 200 mm and multiple cross-section options mean you can find the right fit for virtually any standard groove or port.
• Versatile Applications: Suitable for factories, workshops, HVAC systems, automotive, hydraulic equipment, and general household repairs.

Product Specifications

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Frequently Asked Questions

Q: What is an NBR O-ring and what makes it different from other rubber O-rings?

A: NBR stands for Nitrile Butadiene Rubber, a synthetic elastomer specially formulated for excellent resistance to oils, fuels, and hydraulic fluids. Compared to standard rubber O-rings, NBR O-rings offer superior oil resistance and durability in both wet and oily environments, making them the preferred choice for plumbing, automotive, and industrial sealing applications.

Q: How do I choose the correct O-ring size for my application?

A: You need to match two key measurements: the Cross-Section (CS) diameter (the thickness of the ring itself — 1.2 mm, 2 mm, or 4 mm available here) and the Outside Diameter (OD) (the total outer width of the ring, ranging from 5 mm to 200 mm in this set). Measure your groove or port carefully and select the CS and OD that correspond to those dimensions for a proper, leak-free seal.

Q: Are these O-rings suitable for air conditioning systems?

A: Yes. These NBR rubber O-rings are listed as suitable for air conditioning applications. Their temperature resistance and waterproof properties make them effective for sealing refrigerant lines, AC fittings, and related HVAC components.

Q: Can these O-rings be used for both home DIY repairs and professional/industrial use?

A: Absolutely. These standard NBR O-ring seals are designed for use in both homes and factories. Whether you are fixing a leaky tap, servicing hydraulic equipment, or sealing industrial machinery, these gaskets deliver consistent performance across a wide range of environments.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.