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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 Gasket Joint Iron Pipe Sizes (IPS) Straight Conduits
Unit of Measure
1 

Part #

Item Name

Nominal Size

Average Outside Diameter

Inside Diameter [Min]

Nominal Wall Thickness

60C-HW-20-G N/A 6 Inch (in) Nominal Size Heavy Wall Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint N/A 6 in152 mm N/A 6.654 in169 mm N/A 6.435 in163 mm N/A 0.110 in3 mm
30C-SW-20-G N/A 3 Inch (in) Nominal Size Standard Wall Iron Pipe Size (IPS) Aboveground Straight Conduit with Gasket Joint N/A 3 in76 mm N/A 3.500 in89 mm N/A 3.360 in85 mm N/A 0.070 in2 mm
50A-MW-10-G N/A 5 Inch (in) Nominal Size Medium Wall Iron Pipe Size (IPS) Belowground Straight Conduit with Gasket Joint N/A 5 in N/A N/A N/A
Unit of Measure
1