- 3M
- Armacell
- Aero Dyne
- AirGuide
- Air Products and Controls
- Atco
- Baileigh
- Betenbender
- Binks
- Boss
- Bramec
- Broan
- Builder’s Best
- CADDY
- Cain
- CertainTeed
- Construction Solutions
- Diversitech
- Ductmate
- Duro Dyne
- Dynatemp
- Ecco Manufacturing
- Edwards
- Emerson
- Empire
- Fairmont
- Fieldpiece
- Flagler
- Flexmaster
- Florida Strut
- Foster
- Fresh-Aire UV
- Galeton
- General
- GreenSeam Industries (GSI)
- Gripnail
- Greenlink Engineering
- Hardcast (Carlisle)
- Hart & Cooley
- Hero Fabriduct, LLC
- Honeywell
- Hydrazorb
- InOvate
- JEDCO Supply
- JOBOX
- Johns Manville (JM)
- Kett
- K-Flex
- Knauf Insulation
- LIFT
- Lloyd Industries
- Lockformer
- Lufkin
- Malco
- Mason Industries
- Mastercool
- Miami Tech
- Mid-Rivers
- Midwest Metal Products
- Mon-Eco
- Morlin
- Namcor
- NDL
- Norlok
- nVent
- Owen’s Corning (OC)
- Panasonic
- Pexto
- Pipe Prop
- Polymer Adhesives
- Presto Tape
- Pro1
- Proto Corporation
- Purolator
- QwikProducts
- Quietflex
- Rapid Locking System (RLS)
- Rectorseal
- Reflectix
- Reliable
- RGF Environmental Group, Inc.
- Roll Former, LLC
- Roper Whitney
- Roto-Die
- Ruoff
- Shurtape
- Southwark
- Spiral Helix (Spiro)
- Southwire
- Sumner (Southwire)
- Superior
- Tennsmith
- Thermaflex
- Tin Knocker
- Tracpipe (Omega Flex)
- TRUaire
- Trumpf
- Uniweld
- Vicon
- Wellsaw
- WF Wells
- White-Rodgers (Emerson)
- Wimco
- Wiss
- WDM
Conklin Metal Industries
Sheet Metal, Duct Fab & HVAC supplies—Founded in 1874