- Associated Spring Ramond - Springs and washers.
- Boker's, Inc. - Lots and lots of washers, spacers and shims
- Lee Spring - Springs
- Phoenix Specialty - Manufacturer of washers, shims, seals, gaskets, and spacers.
- SDP/SI - Lots of mechanical parts.
- Seastrom - Lots of metal stampings, custom washers, hardware, o-rings, clamps and brackets.
- Stimpson - Lots of strange little parts.