FKM Fluorine Rubber O-Ring Seals CS2–5mm OD5–115mm Black

Ouling FKM Black Fluorine Rubber O-Ring Seals

Engineered for demanding industrial and household applications, these FKM (Fluorocarbon) Black Rubber O-Ring Seals by Ouling deliver outstanding resistance to oils, fuels, chemicals, heat, and wear. Available in a wide range of cross-section thicknesses (CS 2mm, 2.8mm, 5mm) and outer diameters from 5mm to 115mm, there's a size to suit virtually any sealing requirement — from air conditioning systems and hydraulic fittings to automotive components and factory machinery.

Key Features

• Material: Premium FKM (Fluorocarbon Rubber) — superior corrosion and chemical resistance
• Color: Black
• Cross-Section (CS): 2mm / 2.8mm / 5mm
• Outer Diameter (OD): 5mm – 115mm
• Shape: Standard Ring Gasket
• Oil Resistant: Withstands prolonged contact with petroleum-based oils and lubricants
• Wear Resistant: Long service life even under repeated mechanical stress
• Temperature Resistant: Maintains a reliable seal across a wide temperature range
• Corrosion Resistant: Fluorine rubber composition guards against aggressive chemicals and solvents
• Versatile Use: Suitable for factories, workshops, HVAC/air conditioning systems, plumbing, and general home maintenance

Specifications

Why Choose FKM Over Standard Rubber?

FKM (fluorocarbon rubber) offers significantly better resistance to heat, oils, fuels, and harsh chemicals compared to standard NBR or EPDM rubber. This makes Ouling's FKM O-rings the go-to choice for applications where standard rubber seals may fail prematurely — including high-temperature hydraulic systems, chemical processing equipment, and automotive fuel systems.

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Frequently Asked Questions

Q: What does FKM stand for and why does it matter for O-ring seals?

A: FKM stands for Fluorocarbon Rubber (also known by the trade name Viton®). It is a high-performance elastomer renowned for its exceptional resistance to oils, fuels, hydraulic fluids, and aggressive chemicals, as well as its ability to maintain a reliable seal across a wide temperature range. Choosing FKM O-ring seals ensures longer service life and reduced maintenance in demanding industrial, automotive, and HVAC applications.

Q: What sizes are available for these FKM O-rings?

A: These Ouling FKM O-rings are available in cross-section (CS) thicknesses of 2mm, 2.8mm, and 5mm, with outer diameters (OD) ranging from 5mm up to 115mm. This broad size range covers a wide variety of standard metric sealing grooves used in machinery, plumbing fittings, and air conditioning systems.

Q: Are these O-rings suitable for home use as well as industrial use?

A: Yes. While Ouling FKM O-rings are built to handle the demands of factories and industrial equipment, they are equally suitable for home plumbing repairs, HVAC maintenance, and general DIY projects requiring a reliable, corrosion-resistant gasket seal.

Q: How do I choose the correct O-ring size?

A: To select the right O-ring, measure the groove or fitting's inner diameter (ID) and the cross-section (CS/width) of the groove. The outer diameter (OD) of the O-ring should match the outer edge of the groove. Refer to standard metric O-ring sizing charts if needed, and match both the CS thickness and OD from the available options (CS 2mm/2.8mm/5mm, OD 5–115mm).

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.