Colonial TelTek
Colonial TelTek
201 W. Church Road
King of Prussia, PA 19406
Phone: (855) 686-7713
Email: Info@colonialteltek.com
Website: www.knobsource.com
Print Back
The interference joint system consists of an integral bell and spigot. The spigot end has a buttress type, male thread for easy installation. The belled end contains the mating female threads. The tapered buttress threads make it easy to join while giving it a high pull out strength of 1,000 lbs. The joint is concrete tight but not water tight.
Interference Joint Tubular Size (ID) Straight Conduits
Unit of Measure
1 

Part #

Item Name

Nominal Size

Average Outside Diameter

Inside Diameter [Min]

Nominal Wall Thickness

25D-SW-20-I N/A 2 1/2 Inch (in) Nominal Size Standard Wall ID Aboveground Straight Conduit with Interference Joint N/A 2 1/2 in64 mm N/A 2.640 in67 mm N/A 2.52 in64 mm N/A 0.070 in2 mm
60B-SW-20-I N/A 6 Inch (in) Nominal Size Standard Wall ID Belowground Straight Conduit with Interference Joint N/A 6 in152 mm N/A 6.140 in156 mm N/A 6.000 in152 mm N/A 0.070 in2 mm
Unit of Measure
1