The flanges of Type J Sure-Flex Elastomeric Couplings sizes 3, 4 and 5 are manufactured of sintered carbon steel. The powdered metal manufacturing process provides high dimensional accuracy and uniform material properties for high strength.

Size 6 is made of high strength cast iron. Flanges are bored-to-size for a slip fit on standard shafts. The outside face of the flange is precision machined, allowing the surface to be used to align the coupling without special tools. Type J flanges can be used to align the coupling with EPDM and Neoprene sleeves. Each flange has a standard keyway and one setscrew at 90° from the keyway.

The flanges of Type S Sure-Flex Elastomeric Couplings sizes 6 through 16 are manufactured of high strength cast iron then bored-to-size for a slip fit on standard shafts.

Size 5 is made of sintered carbon steel. Flanges are easy to install and remove, and are stocked in a wide range of bore sizes. All sleeve materials may be used with Type S flanges.