CS 2.4mm O-Rings EPDM NBR VMQ FKM Rubber Seals Gaskets 6–41mm

CS 2.4mm Rubber O-Rings — EPDM, NBR, VMQ & FKM Sealing Gaskets

Keep your plumbing, hydraulic, pneumatic, and mechanical systems leak-free with these precision-engineered O-rings. Available in a wide selection of materials — EPDM, NBR (Nitrile), VMQ (Silicone), and FKM (Fluorine/Viton) — these standard-sized ring gaskets cover outer diameters from 6 mm to 41 mm with a cross-section (CS) of 2.4 mm. Whether you're sealing a water line, fuel system, or industrial fitting, there's a material and size here to match your application. Made in Mainland China.

Material Guide

• EPDM (Green): Excellent resistance to water, steam, and weathering. Ideal for outdoor and water-based applications.
• NBR / Nitrile (Black): Outstanding resistance to oils, fuels, and petroleum-based fluids. A top choice for automotive and hydraulic systems.
• VMQ / Silicone (Red/White): Wide temperature range performance, flexible and food-grade compatible. Great for kitchen appliances and medical equipment.
• FKM / Fluorine (Green): Superior chemical and high-temperature resistance. Perfect for harsh chemical environments and fuel systems.

Key Features

• CS (Cross Section): 2.4 mm
• OD Range: 6 mm – 41 mm
• Materials: EPDM, NBR, VMQ (Silicone), FKM (Fluorine/Viton)
• Colors: Black (NBR), Green (EPDM/FKM), Red & White (VMQ Silicone)
• Shape: Standard Ring Gasket
• Standard-sized for easy universal replacement
• High sealing performance — resists compression set and deformation
• Suitable for static and dynamic sealing applications

Common Applications

• Plumbing and pipe fittings
• Automotive fuel and hydraulic systems
• Pneumatic tools and equipment
• Industrial machinery and compressors
• Kitchen appliances and water purifiers
• DIY repairs and maintenance

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Frequently Asked Questions

Q: What is the difference between NBR, EPDM, VMQ, and FKM O-rings?

A: Each material is designed for specific environments. NBR (Nitrile/Black) excels with oils and fuels; EPDM (Green) is best for water, steam, and outdoor exposure; VMQ/Silicone (Red/White) handles wide temperature extremes and is food-grade compatible; FKM/Fluorine (Green) offers the highest resistance to aggressive chemicals and elevated temperatures. Choose based on the fluid or gas being sealed and the operating temperature range.

Q: What size are these O-rings, and how do I measure which one I need?

A: These O-rings have a cross-section (CS) diameter of 2.4 mm and outer diameters (OD) ranging from 6 mm to 41 mm. To find the right size, measure the groove or fitting where the O-ring sits — note the inner diameter (ID) and the groove width, then select the matching OD and CS accordingly.

Q: Are these O-rings suitable for high-pressure applications?

A: Yes, standard rubber O-rings in EPDM, NBR, VMQ, and FKM materials are widely used in both low and moderate-to-high pressure sealing applications. For extreme pressure environments, FKM or NBR are typically the preferred choices due to their superior compression resistance and dimensional stability.

Q: Can VMQ Silicone O-rings be used in food-contact or drinking water applications?

A: VMQ (Silicone) O-rings are commonly used in food-grade and potable water applications due to their non-toxic, odourless, and taste-neutral properties. EPDM is also widely accepted for drinking water systems. Always verify compliance with the relevant local standards for your specific use case.

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.