- Air Filters, Inc.
 - Baltimore - We carry HVAC, custom dust trap, and activated carbon disposable panel filters. - Atlantic Pressure Washers
- Baltimore - Offers pressure washers, accessories, parts and soaps tailored for the home and light commercial user.
- Atlantic Valve & Supply Co., Inc.
- Baltimore - Distributor of valves and pipe fittings for marine or industrial uses.
- Baltimore Aircoil Company
- Baltimore - Makes evaporative heat transfer and ice thermal storage products.
- Centra Corporation
- Baltimore - Used industrial machine tool dealer and appraiser.
- Comeq, Inc.
- Baltimore - U.S. and Canadian distributor of metal fabricating machinery. Based in Baltimore, Maryland.
- Cummins-Wagner Co., Inc.
- Annapolis Junction - Industrial machinery distributor specializing in pumps, compressors, heat exchangers, and boilers.
- CvL Technical Sales
- Baltimore - Distributor for process control instruments, valves, valve actuation, electric heaters and steam traps.
- Ellicott International
- Baltimore - Manufacturer of cutter suction dredges and dredging equipment.
- Haemo-Sol, Inc.
- Baltimore - Manufacturer of high-surfactant detergents, for use in dissolving proteinaceous soil from any apparatus without scrubbing.
- J. Dashew Inc.
- Baltimore - Industrial sewing machinery and equipment, components, parts and supplies, cutting room supplies, and more.
- Maryland Metrics
- Baltimore - Offers over 400,000 metric sized items from over 900 suppliers, worldwide.
- Maryland Wire Belts
- Church Creek - Manufacturer of metal conveyor belts, including metal mesh belting, flat wire, and honeycomb belting.
- McCormick Insulation Supply Inc.
- Owings Mills - Wholesale distributor of commercial, industrial, and HVAC insulation materials and accessories. Serving the Mid-Atlantic States.
- Norman Machine Tool Ltd.
- Baltimore - Buys and sells CNC and conventional metalworking and fabricating machine tools, accessories and shop-related equipment.
- Pevco
- Baltimore - Pneumatic tube system sales, service and installation.
- SawJammer
- Baltimore - Manufacturer of foot protection from power and chain saws.
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