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FKM O-Rings — 75 Shore A

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High-performance FKM O-rings for laboratory sealing applications, electrochemical cells, fluidic assemblies and chemical handling systems. Manufactured from 75 Shore A fluorocarbon rubber, they provide good resistance to oils, acids, alkalis and a broad range of chemicals. Supplied in packs of 10 in selected metric sizes.

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S4R FKM O-Rings provide a reliable sealing solution for laboratory equipment, electrochemical cells, fluidic assemblies and chemical handling systems. Manufactured from 75 Shore A fluorocarbon rubber, they combine good chemical resistance with the elasticity required for static sealing applications. Selected metric sizes are supplied in convenient packs of 10.

Key Features

FKM fluorocarbon rubber construction
75 Shore A hardness
Good resistance to oils, acids, alkalis and many chemicals
Circular cross-section for conventional O-ring grooves
Selected metric sizes from 4 to 50 mm inner diameter
Convenient laboratory pack of 10

Typical Applications

Electrochemical and battery test cells
Laboratory fluidic fittings and connections
Static sealing of laboratory assemblies
Chemical handling systems
Vacuum and controlled-atmosphere equipment
Laboratory equipment maintenance and replacement
Technical Specifications
Material FKM / FPM Fluorocarbon Rubber
Hardness 75 Shore A
Cross-Section Circular
Size Designation Inner Diameter × Cross Section (ID × CS)
Temperature Range −20 to 230 °C*
Color Green or Brown (may vary by batch)
Sales Unit Pack of 10 O-rings
Available Sizes & Dimensions
Inner Diameter (ID) Cross Section (CS) Outer Diameter (OD)
4.00 mm 1.80 mm 7.60 mm
5.00 mm 1.80 mm 8.60 mm
6.00 mm 1.80 mm 9.60 mm
8.00 mm 1.80 mm 11.60 mm
10.00 mm 1.80 mm 13.60 mm
12.50 mm 2.65 mm 17.80 mm
15.00 mm 2.65 mm 20.30 mm
20.00 mm 2.65 mm 25.30 mm
25.00 mm 2.65 mm 30.30 mm
30.00 mm 3.55 mm 37.10 mm
40.00 mm 3.55 mm 47.10 mm
50.00 mm 3.55 mm 57.10 mm
OD is calculated as ID + 2 × CS. Dimensions are nominal values.
Package Contents
10×
FKM O-Rings
Chemical & Temperature Compatibility
FKM provides broad chemical and oil resistance, but compatibility depends on the specific fluid, concentration, temperature, pressure and exposure duration. The −20 to 230 °C range is manufacturer-specified and should not be interpreted as a universal operating range for every application. Compatibility should be verified before use with aggressive chemicals or critical sealing applications.

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