FKM O-Ring Kit 100pcs Fluorine Rubber Gasket Seal Assortment

Ouling FKM O-Ring Kit – 5 Thickness Assortment Set

Keep your equipment sealed and running smoothly with this comprehensive FKM (Fluorine Rubber) O-Ring Assortment Kit from Ouling. Featuring five different cross-section thicknesses — 1mm, 1.5mm, 1.9mm, 2.4mm, and 3.1mm — this kit gives you the right seal for almost any job, from hydraulic systems and automotive components to plumbing fixtures and industrial machinery.

Made in Mainland China.

Why Choose FKM Fluorine Rubber?

Fluoroelastomer (FKM/FPM) is one of the highest-performing rubber compounds available. With a Shore hardness of 80A and an operating temperature range of -20°C to 260°C (-4°F to 500°F), these o-rings outperform standard nitrile and silicone alternatives in the most demanding environments.

• ✅ Oil & Chemical Resistant – withstands hydraulic oils, fuels, and many solvents
• ✅ High-Temperature Stable – rated up to 260°C for extreme heat applications
• ✅ Wear & Abrasion Resistant – maintains integrity under repeated compression
• ✅ Water & Pressure Resistant – creates reliable, leak-free seals
• ✅ Aging Resistant – long service life even in harsh operating conditions

Kit Contents & Specifications

Product Details

• Material: FKM Fluorine Rubber (Fluoroelastomer)
• Shore Hardness: 80A
• Operating Temperature: -20°C to 260°C
• Shape: Round Ring Gasket (Standard)
• Storage Box Size: 12.5 × 6 × 2 cm
• Brand: Ouling

Compact, Organized Storage

Each kit comes neatly packaged in a compact 12.5 × 6 × 2 cm storage box — sized perfectly for a toolbox drawer, workshop shelf, or service van. No more loose o-rings scattered around; find the size you need instantly.

Common Applications

• Automotive engine, transmission & fuel system seals
• Hydraulic & pneumatic cylinder repair
• Plumbing fittings and valves
• Industrial pumps and compressors
• Laboratory and chemical processing equipment

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Frequently Asked Questions

Q: What does FKM stand for and why is it better than standard rubber o-rings?

A: FKM stands for Fluoroelastomer (also known as Viton®-type rubber). It offers superior oil, fuel, and chemical resistance along with a wide operating temperature range of -20°C to 260°C, making it far more durable than standard nitrile (NBR) or EPDM o-rings in demanding applications.

Q: How many o-rings are included in the FKM O-Ring Kit?

A: The kit includes rings across five thickness categories. Four of the thickness variants (1mm, 1.5mm, 1.9mm, 2.4mm) contain 10 sizes × 10 pieces each (100 pcs per thickness), while the 3.1mm variant contains 10 sizes × 5 pieces each (50 pcs). Each set is packaged in its own labeled storage box for easy identification.

Q: Are these FKM o-rings suitable for use with hydraulic oil and fuel systems?

A: Yes. FKM fluorine rubber is specifically rated for excellent resistance to hydraulic oils, mineral fuels, and a wide range of chemicals, making these o-rings ideal for automotive, hydraulic, and industrial sealing applications.

Q: What is the Shore hardness of these o-rings?

A: These o-rings have a Shore hardness of 80A, which indicates a firm yet flexible rubber compound that maintains its seal under compression and pressure in standard industrial sealing grooves.

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.