| | Burgess-Norton Manufacturing Manufactures piston pins, powdered metal parts, valve guides, rocker arms, machine & woodworking keys, shafts & powdered metal assemblies | |
| | Burns, J F Machine Co Inc Machine shop: precision machined components & case hardened pins | |
| | Champion Rivet Rivets; knuckle & induction hardened railroad brake pins | |
| | Chicago Hardware & Fixture Co Industrial & marine hardware: bolts, studs, wire forms, clips, nuts, washers, swivels, chuck keys, pins, clamps & fittings | |
| | Chicago Wire Products Precision pins & shafts, screw machine products, wire & wire products | |
| | Controlled Precision Machining Machine shop: precision machining & grinding; deep hole drilling; CNC turning; mill work; core pins, sleeves & punches | |
| | D & S Wire Inc Pins, wire redrawing, straightening & cutting | |
| | Dowels Pins & Shafts Inc Dowels, pins & shafts | |
| | Driv-Lok Inc Threadless fasteners: spring pins, keys, dowels & studs | |
| | E K Industries Inc Manufacture rail car brake pins & concrete form stakes | |
| | Eagle Machine & Fasteners Inc Steel, brass, copper, plastic connectors & pins | |
| | Fastener Industries Inc Weld fasteners: bolts, nuts, screws, pins & leveling feet | |
| | FRB Machine Inc Machine shop: CNC machining, shaft collars, driveshafts, flanges, sleeves, pins, couplings & spacers | |
| | Gauntlet Awards & Engraving Trophies, plaques, signs, badges, custom pins, advertising specialties, sports medals, machine panels & labels | |
| | GEMCO Inc Insulation fasteners: double pointed & weld pins | |
