Panzergewinde

The Stahlpanzerrohrgewinde standard for screw threads, more often called by the shorter name Panzergewinde (pronunciation), was a technical standard created in Germany and subsequently used in various countries, such as the German-speaking world (Germany, Switzerland, Austria) and neighboring European countries. It has been retracted. The German name Stahlpanzerrohrgewinde translates to English as steel conduit thread. The thread is used to join pieces of electrical conduit and cable glands.

An assortment of PG cable glands. Similar glands with DIN/ISO metric threads are also available.

Alternative stylings of the German name are Stahl-Panzer-Rohr-Gewinde and an abbreviated form, StaPa-Rohr-Gewinde.

Overview

The standard, codified by the Deutsches Institut für Normung (DIN, German Institute for Standardization), is DIN 40430. Panzergewinde sizes are named with the prefix PG plus a nominal number which approximately corresponds to the maximum cable diameter (in millimeters) that can be passed through the conduit.

Because the walls of the conduit are usually relatively thin, the thread depth is limited. Thus a thread angle of 80° is used. The Verband der Elektrotechnik, Elektronik und Informationstechnik (VDE) (which began as a trade association for standardization in electrical engineering) originally standardized (and named) the thread for use with conduit and cable glands that were made of steel, although today the thread is used with both steel (typically plated with combinations of nickel, zinc, or tin to resist rusting) and polyvinyl chloride (PVC).

Beginning in 2000, the VDE standard for cable glands (VDE 0619) was formally replaced by EN 50262. After a transitional period of several years during which it could still be used, it was replaced in 2003 by a final metric fine thread with 1.5 mm (0.0591 in) pitch. Similarly, conduit threads were replaced by EN 60423.

Even today, Panzergewinde cable glands are still often found on chemical reactors and bioreactors (for example, PG13.5 thread for screwing in sensors) and various other equipment, enclosures, junction boxes, and connectors.

Gland sizes

Thread
nominal
size
Thread
major dia.
Thread
density
(TPI)
Thread
pitch
Inner
diameter
Cable
diameter
(mm) (in) (mm) (in) (mm) (in) (mm) (in)
PG7 12.5 0.492 20 1.27 0.05 11.28 0.444 3–6.5 0.118–0.256
PG9 15.2 0.598 18 1.4112 0.0556 13.86 0.546 4–8 0.157–0.315
PG11 18.6 0.732 18 1.4112 0.0556 17.26 0.680 5–10 0.197–0.394
PG13.5 20.4 0.803 18 1.4112 0.0556 19.06 0.750 6–12 0.236–0.472
PG16 22.5 0.886 18 1.4112 0.0556 21.16 0.833 10–14 0.394–0.551
PG21 28.3 1.114 16 1.5875 0.0625 26.78 1.054 13–18 0.512–0.709
PG29 37.0 1.457 16 1.5875 0.0625 35.48 1.397 18–25 0.709–0.984
PG36 47.0 1.850 16 1.5875 0.0625 45.48 1.791 24–32 0.945–1.260
PG42 54.0 2.126 16 1.5875 0.0625 52.48 2.066 32–38 1.260–1.496
PG48 59.3 2.335 16 1.5875 0.0625 57.78 2.275 37–44 1.457–1.732

Pronunciation

  • Stahlpanzerrohrgewinde: SHTAHL-pahntser-rōr-geh-vĭn-deh
  • Panzergewinde: PAHNTSER-geh-vĭn-deh
  • PG: pee-gee

See also

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