20PCS Black NBR O-Ring Seals CS2.65mm – Nitrile Rubber Gaskets

$12.45 $14.07

Shipping calculated at checkout.

20-Pack Black NBR O-Ring Seals – Oil-Resistant Nitrile Rubber Gasket Washers

Keep your machinery, plumbing, and hydraulic systems leak-free with these heavy-duty Black NBR (Nitrile Butadiene Rubber) O-Ring Seals. Each pack contains 20 precision-formed ring gaskets with a cross-section of CS 2.65mm and inner diameters ranging from ID 43.7mm to 50mm. Engineered for demanding industrial and household applications, these standard-size O-rings deliver reliable sealing performance at an excellent value.

Made in Mainland China.

Key Features

Wide Temperature Range: Rated for continuous use from -40°C to +120°C (-40°F to 248°F), making them suitable for both hot and cold environments.
Oil Resistant: NBR material provides outstanding resistance to petroleum-based oils, fuels, and hydraulic fluids — effectively preventing leaks in oil-handling systems.
Excellent Wear Resistance: Durable nitrile rubber construction withstands friction, compression, and repeated use without degrading.
Standard Dimensions: CS 2.65mm cross-section with ID range 43.7mm–50mm — compatible with standard machinery and plumbing fittings.
Versatile Applications: Ideal for use in hydraulic systems, pneumatic equipment, pumps, valves, pipe fittings, automotive components, and general plumbing assemblies.
Value Pack: 20 O-rings per lot — cost-effective for maintenance kits, repairs, and bulk stocking.

Specifications

Specification	Detail
Material	NBR (Nitrile Butadiene Rubber)
Color	Black
Cross Section (CS)	2.65 mm
Inner Diameter (ID)	43.7 mm – 50 mm
Shape	Ring Gasket
Standard	Standard
Operating Temperature	-40°C to +120°C
Quantity	20 PCS per lot

Common Applications

Hydraulic and pneumatic machinery sealing
Plumbing pipe fittings and valve assemblies
Automotive engine and fuel system components
Industrial pumps and compressors
General maintenance and repair kits

Note: Due to variations in display settings and lighting, the actual product color may differ slightly from the images shown.

Frequently Asked Questions

Q: What material are these O-ring seals made from?

A: These O-rings are made from NBR (Nitrile Butadiene Rubber), a high-performance synthetic rubber known for its excellent resistance to petroleum oils, fuels, and hydraulic fluids. NBR is one of the most widely used materials for O-ring gaskets in industrial and plumbing applications.

Q: What is the operating temperature range for these NBR O-rings?

A: These nitrile rubber O-ring seals are rated for use across a wide temperature range of -40°C to +120°C (-40°F to 248°F), making them suitable for both low-temperature and moderately high-heat environments in machinery and plumbing systems.

Q: What sizes are included in this 20-piece O-ring lot?

A: Each lot contains 20 black NBR O-rings with a cross-section (CS) of 2.65mm. The inner diameter (ID) range covered is 43.7mm to 50mm. These are standard-dimension gaskets compatible with common machinery, hydraulic, and plumbing fittings.

Q: Can I use these O-rings for both oil and water sealing?

A: Yes. While NBR O-rings excel at resisting petroleum-based oils and fuels, they are also effective for water and general fluid sealing in plumbing and hydraulic applications. They provide a reliable, compression-fit seal to prevent leakage in a wide variety of systems.

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.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.