
FS8 – START COLLAR
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
A 8-inch round start collar used to connect round ductwork to a rectangular plenum box. The crimped end slides into standard round duct, and the flat flange mounts to the plenum with screws or duct tape. Used in new duct installations and adding supply runs to existing systems.
Specs: 8″ round, galvanized steel, crimped end, for metal or ductboard plenums
Replaces: 5258, FS8
Fits: Standard 8″ round ductwork connecting to rectangular plenums in residential and light commercial HVAC systems
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- FS8
- MM8-INCH
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.
Fits these models
- SPEEDI-COLLARSC-08




