NBR O-Ring Set 740/1200pcs – Nitrile Rubber Oil & Waterproof

NBR Nitrile Rubber O-Ring Assortment Set – 740 or 1200 Pieces

Keep every seal tight and every joint leak-free with this comprehensive NBR (Nitrile Butadiene Rubber) O-Ring Set. Whether you're a professional mechanic, plumber, DIY enthusiast, or industrial technician, this assortment delivers the right seal for the job — every time. Available in 740-piece and 1200-piece kits, you'll have a wide range of sizes ready to go whenever you need them.

Made in Mainland China.

Why Choose This NBR O-Ring Set?

• Premium NBR Material: Nitrile rubber offers excellent resistance to oils, fuels, hydraulic fluids, and a broad range of industrial chemicals — ideal for automotive, plumbing, and machinery applications.
• Oil-Resistant & Wear-Resistant: Engineered to withstand continuous exposure to petroleum-based fluids and mechanical wear, ensuring long-lasting performance.
• Waterproof Sealing: Creates a reliable watertight seal in pipes, faucets, valves, and hydraulic systems, preventing costly leaks.
• Wide Size Assortment: Multiple inner diameters and cross-sections covered in one kit — no more guessing or making multiple trips to the hardware store.
• CE Certified: Meets CE certification standards for quality and safety assurance.
• Standard Shape – Flat Gasket/O-Ring: Universal flat gasket design fits a broad variety of standard fittings and connectors.
• 100% Brand New: Every piece is carefully inspected before shipping. Note: a slight rubber odour upon first opening is completely normal due to sealed packaging — simply rinse with water and air dry to eliminate it.

Specifications

• Material: NBR (Nitrile Butadiene Rubber)
• Colour: Black
• Shape: Flat Gasket / O-Ring
• Standard: Standard sizes
• Certification: CE
• Set Size: 740 pcs or 1200 pcs
• Model Number: XJ38

Common Applications

• Automotive engines, transmissions & fuel systems
• Household plumbing — faucets, taps & valves
• Hydraulic & pneumatic machinery
• Air compressors & pumps
• Garden irrigation systems and hose connectors
• Industrial equipment maintenance & repair

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For more information on safe use of rubber and sealing materials in plumbing and industrial settings, refer to the U.S. Consumer Product Safety Commission (CPSC).

Learn more: O-ring

Frequently Asked Questions

Q: What is NBR nitrile rubber and why is it used for O-rings?

A: NBR (Nitrile Butadiene Rubber) is a synthetic rubber known for its exceptional resistance to oil, fuel, hydraulic fluid, and water. It is one of the most widely used materials for O-ring seals in automotive, plumbing, and industrial applications because it maintains flexibility and sealing performance across a wide temperature range, typically from -40°C to +120°C.

Q: How many sizes are included in the NBR O-ring set?

A: The set is available in either a 740-piece or 1200-piece assortment, each covering a broad range of standard inner diameters and cross-sections. This ensures you have the right size O-ring on hand for most common fittings, valves, and connectors without needing to source individual sizes.

Q: Is the slight smell from the O-rings harmful?

A: No, the slight rubber odour you may notice upon first opening is completely normal. It occurs because the products have been stored in sealed packaging. Simply rinse the O-rings in clean water and allow them to air dry naturally — the smell will dissipate quickly and poses no health concern during normal use.

Q: Are these O-rings suitable for use with automotive oils and fuels?

A: Yes. NBR nitrile rubber is specifically chosen for its outstanding resistance to petroleum-based oils, fuels, and hydraulic fluids, making this O-ring set an excellent choice for automotive engine, transmission, and fuel system repairs and maintenance.