The Pg thread series is designed specifically for steel conduit because of the thin wall cross section of the steel conduit. The thin wall thickness requires a shorter profile thread that will not break through the outside diameter of the steel conduit during the machining process. The 80° included angle of the Pg thread form gives a shorter profile than the more common 60° included angle found in the Unified National thread series and the Metric thread series.
Pg Thread Taps are made as per DIN 40430
