PG Thread DIN 40430
The DIN 40430 PG thread, also known as armored conduit thread, is a thread type that is now rarely used. Other names for this thread include armored pipe thread or StaPa pipe thread. It was used in electrical installations, especially with steel armored conduits that protect cables and wires from damage. It was also found in cable glands. In the early 2000s, DIN 40430 was replaced by a new standard prescribing metric sizes, complicating the transition to the new system. Today, the DIN 40430 PG thread is used in very few special cases, such as sensors for a specific type of bioreactor.
The DIN 40430 PG thread has a flank angle of 80°. Due to the thin wall thickness of the steel armored conduits, a shallow thread depth had to be maintained.
The thread designation consists of the abbreviation Pg and the nominal size, e.g., Pg 7.
In the thread table for the DIN 40430 PG thread, the conduit diameter of the electrical installation plays a significant role. Also listed are the external diameter of the thread, the core hole diameter, and the pitch in mm. The shift to metric threading created compatibility issues between the old and new systems. The second table provides suggestions on which metric sizes can replace the old Pg dimensions. Finally, a third table clarifies which wrench sizes correspond to the old Pg dimensions and the new metric dimensions. Dies and taps for the PG thread are easily found in our shop; just follow the link in the table.
| Cable diameter mm | Thread Identification | Outer diameter mm | Core hole diameter mm | Pitch mm | Taps in our Online-Shop | Dies in our Online-Shop |
|---|---|---|---|---|---|---|
| 6,0 | Pg 7 | 12,5 | 11,3 | 1,27 | Link to the tap | Link to the thread cutting die |
| 8,0 | Pg 9 | 15,2 | 13,9 | 1,41 | Link to the tap | Link to the thread cutting die |
| 10,0 | Pg 11 | 18,6 | 17,3 | 1,41 | Link to the tap | Link to the thread cutting die |
| 12,0 | Pg 13.5 | 20,4 | 19,1 | 1,41 | Link to the tap | Link to the thread cutting die |
| 14,0 | Pg 16 | 22,5 | 21,2 | 1,41 | Link to the tap | Link to the thread cutting die |
| 18,0 | Pg 21 | 28,3 | 26,8 | 1,59 | Link to the tap | Link to the thread cutting die |
| 25,0 | Pg 29 | 37,0 | 35,5 | 1,59 | Link to the tap | Link to the thrread cutting die |
| 32,0 | Pg 36 | 47,0 | 45,5 | 1,59 | Link to the tap | Link to the thread cutting die |
| 38,0 | Pg 42 | 54,0 | 52,5 | 1,59 | Link to the tap | Link to the thread cutting die |
| 43,0 | Pg 48 | 59,3 | 57,8 | 1,59 | Link to the tap | Link to the thread cutting tap |
The safety standard VDE 0619 together with the standards named therein for DIN 46320 (PG dimensions) and DIN 46319 (metric dimensions) were withdrawn on December 31, 1999 and replaced by the new standard DIN EN 50262, which came into force on January 1, 2000. The latter uses metric sizes (fine pitch thread, pitch 1.5 mm). There was a transitional period until 01.03.2001 during which the PG system could continue to be used. When it comes to replacement purposes, the use of PG articles is still possible. The following 10 dimensions PG 7 / 9 / 11 / 13.5 / 16 / 21 / 29 / 36 / 42 and PG 48 have been replaced by the following new, total of 8 metric dimensions M 12 / 16 / 20 / 25 / 32 / 40 / 50 and M 63. However, this also means that a 1-to-1 conversion is not possible.
There is no practicable solution to the problem in the new standard.