| Metal - Sheet Steel | |
| HEIDTMAN STEEL PRODUCTS INC | STEEL SHEETS |
| MAJESTIC STEEL SERVICE, INC. | STEEL SHEETS |
| Metal - Specialty | |
| COPPER AND BRASS SALES, INC | COPPER, STAINLESS, ALUMINUM |
| FIRESTONE METAL PRODUCTS LLC | COPPER, PAINTED ALUMINUM |
| Mc NICHOLS COMPANY | PERFORATED, FLATTENED EXPANDED |
| PETERSON ALUMINUM CORPORATION | COPPER, PAINTED ALUMINUM |
| RYERSON | STAINLESS, ALUMINUM, COPPER, PAINTED ALUMINUM |
| Metal - Angle Iron | |
| ALRO STEEL | ANGLE IRON |
| O'NEAL METALS - FORT WAYNE | ANGLE IRON |
| WESTFIELD STEEL INC. | ANGLE IRON |
| Gutter & Accessories | |
| BERGER BUILDING PRODUCTS CORP | GUTTER |
| KLAUER MANUFACTURING CO. | GUTTER ACCESSORIES |
| STEELE PLASTICS MFG. COMPANY | GUTTER ACCESSORIES |
| Registers | |
| ALP LIGHTING & CEILING PROD | EGG CRATE |
| HART & COOLEY, INC | REGISTERS |
| PROTECT PLUS INDUSTRIES, LLC | FILTERS |
| SMITH FILTER CORPORATION | FILTERS |
| Ductwork | |
| ATCO/MASTERFIT | PIPE, DUCT, & FITTINGS |
| HART & COOLEY, INC | FLEXIBLE DUCT |
| LUKJAN METAL PRODUCTS, INC. | PIPE, DUCT, & FITTINGS |
| AIR & ENERGY PRODUCTS,LLC. | PIPE TAKEOFFS & RETURN DROPS |
| SNAPPY AIR DISTRIBUTION PRODS | PIPE TAKEOFFS |
| WESTERN AG SALES CO., INC. | PVC ROUND DUCT |
| Ductwork -Spiral | |
| JTD SPIRAL INC. | SPIRAL PIPE |
| LAWLER MANUFACTURING CO INC | BLAST GATES |
| MIDWEST METAL PRODUCTS | BLAST GATES, ANGLE IRON RINGS |
| STAMPED FITTINGS, INC. | SPIRAL ACCESSORIES |
| Ductwork - Insulation | |
| AMERISAFE | MILLBOARD |
| IDEAL TAPE COMPANY, INC. | IRON-ON TAPE |
| JOHNS MANVILLE INT'L INC | INSULATION |
| Ductwork - Accessories | |
| C & S MANUFACTURING CORP | DUCT HANGERS |
| CLEATS MANUFACTURING CO., INC | DUCT CONNECTORS |
| DURO DYNE CORPORATION | DUCT ACCESSORIES |
| MINERALLAC COMPANY | DUCT HANGERS |
| SHURTAPE-TECHNOLOGIES INC | TAPE |
| THERM-O-MANUFACTURING, INC | DUCT ACCESSORIES |
| WARD INDUSTRIES, INC. | DUCT ACCESSORIES |
| Venting | |
| BUILDER'S BEST, INC. | BATH & FAN VENTING |
| D & W, INC. | SOFFIT VENT |
| EMPIRE VENTILATION EQUIP. CO. | REVOLVING CAPS |
| FRESH AIR MANUFACTURING COMP. | BATH & FAN VENTING |
| GARY STEEL PRODUCTS CORP | VENT CAPS |
| GRAY METAL PRODUCTS, INC. | VENT PIPE |
| HART & COOLEY, INC | FLUE PIPE |
| HY-C COMPANY, INC. | VENT CAPS |
| IN-O-VATE TECHNOLOGIES | BATH & FAN VENTING |
| LAMBRO INDUSTRIES, INC. | BATH & FAN VENTING |
| OATEY | ROOF FLASHINGS |
| THE FIELD CONTROLS CO | BAROMETRIC DAMPERS |
| TJERNLUND PRODUCTS, INC | VENT FANS |
| Fasteners | |
| MALCO PRODUCTS, INC | SCREWS |
| MAZE NAILS | NAILS |
| POP FASTENER DIVISION | RIVETS |
| SWAN SECURE PRODUCTS, INC | COPPER NAILS |
| Tools | |
| ACRO BUILDING SYSTEMS | LADDER STAND-OFF |
| ADDISON EQUIPMENT COMPANY | WIMCO SCRIBER |
| AMCRAFT, INC | DUCTBOARD TOOLS |
| AMERICAN SAW & MFG. CO | LENOX CUTTING TOOLS |
| CONSOLIDATED TOLEDO DRILL | DRILL BITS |
| JOHN STORTZ & SON, INC | ROOFING TOOLS |
| L S STARRETT COMPANY | HAND TOOLS |
| MALCO PRODUCTS, INC | HAND TOOLS |
| McKAY BROTHERS | SCRIBER |
| MORLIN MANUFACTURING, INC. | PITTSBURGH HAMMERS |
| NEWBORN BROTHERS & COMP., INC. | CAULK GUNS |
| OHIO TOOL & DRILL COMPANY | DRILL BITS |
| POP FASTENER DIVISION | RIVETERS |
| ROOFING TOOLS AND EQUIPMENT | ROOFING TOOLS |
| ROPER WHITNEY OF ROCKFORD, INC | HAND PUNCHES |
| TENNSMITH, INC. | BENCH TOOLS |
| THE ELECTRIC MATERIALS CO | SOLDERING IRONS |
| Miscellaneous | |
| BRITE PRODUCTS | BRITE-ZINC COLD GALVANIZING SPRAY |
| FORCE INDUSTRIES DIVISION | SOLDERING FLUXES |
| R.M. LUCAS COMPANY | ROOF CEMENTS |
| HIRSCH METALS CORPORATION | SOLDER |
| MARLBORO MANUFACTURING, INC. | HINGES |
| PRECISE ALLOYS | SOLDER |
| SILA-SEAL, INC. | SEALERS |
| TACC INTERNATIONAL CORP | SEALERS |
| THE RECTORSEAL CORPORATION | CHEMICALS |
| THE RUBY CHEMICAL COMPANY | SOLDERING FLUXES |
| W J RUSCOE COMPANY | SEALERS |