EPDM FKM NBR Silicone O-Rings CS 2.65mm ID 33.5–175mm Rubber Seals

Multi-Material Rubber O-Rings — Reliable Sealing for Every Application

Keep your systems leak-free with this comprehensive selection of precision rubber O-rings. Available in a wide range of materials — Black EPDM, Green FKM (Fluorocarbon), Red NBR (Nitrile), Silicone VMQ, and more — these ring gaskets are engineered to deliver a secure, durable seal across a broad spectrum of industrial, mechanical, and household applications. With a cross-section (CS) of 2.65 mm and inner diameter (ID) options ranging from 33.5 mm to 175 mm, there's a size and material to match virtually any need.

Material Guide

• Black EPDM — Excellent resistance to water, steam, weathering, and many chemicals; ideal for outdoor and plumbing use.
• Green FKM (Fluorine/Fluorocarbon Rubber) — Outstanding chemical and heat resistance; suited for fuel systems and aggressive chemical environments.
• Red NBR (Nitrile Rubber) — Superior resistance to oils, fuels, and hydraulic fluids; a go-to for automotive and machinery applications.
• White Silicone (VMQ) — Wide temperature range performance; food-safe and flexible, perfect for kitchen equipment and medical-grade applications.

Key Features

• CS 2.65 mm cross-section for a consistent, reliable seal
• Inner diameter range: 33.5 mm – 175 mm
• Standard ring gasket shape for easy installation and replacement
• Multiple rubber compounds in one listing — choose the right material for your specific environment
• Durable, long-lasting construction that resists deformation under pressure
• Compatible with hydraulic, pneumatic, plumbing, automotive, and industrial systems

Specifications

Related Products You May Like

Looking for more hardware and fastening essentials? Check out these related items from our store:

• 10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips
• 10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals
• 10/20mm Diamond Flat Grinding Wheel Dry and Wet Use Heavy Duty Concrete Grinder

Learn more: OSHA on eye and face protection

Frequently Asked Questions

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

A: Each rubber compound offers different performance characteristics. EPDM O-rings are ideal for water, steam, and outdoor weathering resistance. FKM (Fluorocarbon) O-rings excel in high-temperature and chemically aggressive environments such as fuel and solvent systems. NBR (Nitrile) O-rings are best suited for oil, fuel, and hydraulic fluid applications. Silicone VMQ O-rings offer an exceptionally wide temperature range and are commonly used in food-grade and high-purity applications. Choose the material that matches your specific operating environment.

Q: What does CS 2.65 mm and ID 33.5–175 mm mean for O-rings?

A: CS refers to the cross-section diameter — the thickness of the rubber ring itself, which is 2.65 mm for all options in this listing. ID refers to the inner diameter of the O-ring, which ranges from 33.5 mm to 175 mm. Matching both the CS and ID to your groove dimensions is essential for achieving a proper, leak-free seal.

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

A: Yes, depending on the material selected. FKM O-rings are rated for high-temperature and high-pressure environments, while NBR is well-suited for hydraulic and pneumatic systems. Always verify the specific pressure and temperature ratings for the chosen rubber compound against your application requirements.

Q: Can these O-rings be used in plumbing and water systems?

A: EPDM and Silicone VMQ O-rings are both excellent choices for water and plumbing applications. EPDM offers strong resistance to hot and cold water, while Silicone VMQ is often preferred where food safety or potable water standards are a consideration. NBR and FKM are generally not recommended for hot water or steam use.

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.