- Ace Wire Spring & Form Company, Inc.
- Manufacturer of compression springs, extension springs, torsion springs and wire forms.
- Advanced Spring Technology
- Source for compression, extension and torsion springs and short run and custom springs.
- Arcon Ring
- Established supplier and manufacturer of industrial retaining rings, snap rings, circlips, wire snap rings, eaton rings, and spiral rings.
- Associated Spring, Barnes Group
- Manufactures springs of all types for many applications.
- Bohne Spring
- Custom spring maker offering compression, extension, torsion, wire forming, four-slide, small stamping and light assembly.
- Cook Spring Company
- Full service manufacturer of custom compression springs, extension springs, torsion springs and wire forms to medical, electrical, aerospace and precision specialty manufacturing operations.
- Dayon Manufacturing Inc.
- Manufactures custom miniature springs, sub-miniature compression, extension, as well as standard sizes.
- Hardware Products Company
- Spring manufacturer and JIT inventory specialist, specializing in stock springs, custom spring design, and short run spring manufacturing.
- Newcomb Spring Corp.
- Manufactures compression springs, extension springs, torsion springs, stamped forms and flat springs, wire forms and strip forms, battery contact springs.
- Peninsula Spring Corp.
- Manufacturer of sheet metal stampings, custom washers, wire forms, torsion and compression springs.
- Spring Engineers
- Manufactures coil springs, torsion springs, and compression springs in both standard sizes and custom sizes in brass, copper, titanium, and stainless steel.
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