HCC Industries
- manufacturer of glass-to-metal seals, hermetic connectors, high reliability electrical connection devices.
- http://www.sealtron.com

Interstate Gasket Company
- Manufacturer of gaskets and offers gasket fabrication and precision die cut components for industry.
- http://www.interstate-gasket.com/

All State Gasket
- Manufactured precision gaskets from extreme pressure to caustic containment.
- http://www.allstategasket.com/

Jetseal
- Manufacturers of metal seals for high temperature, high pressure applications.
- http://www.jetseal.com/

Cascade Gasket, Inc.
- Custom fabrication of molded rubber and silicone componentry.
- http://www.cascadegasket.com/

Real Gaskets Tennessee
- Manufacturing silicone and rubber gaskets and washers for aero engines.
- http://www.realgaskets.com/

Cross Manufacturing Company Ltd
- Manufactures brush seals and metal sealing rings for piston and gas turbine engines.
- http://www.crossmanufacturing.com/

Attewell Ltd
- Produces peelable and laminated shims and spacers along with plates and complex housings.
- http://www.attewell.com/

Champion Gasket and Rubber, Inc.
- Custom manufactured, high performance gaskets available in a wide variety of materials and specifications.
- http://www.championgasket.com/