The Stahlpanzerrohrgewinde (, "steel conduit thread") standard for

screw thread A screw thread is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a ''straight'' thread and t ...

s, more often called by the shortened Panzergewinde (), was a

technical standard A technical standard is an established Social norm, norm or requirement for a repeatable technical task which is applied to a common and repeated use of rules, conditions, guidelines or characteristics for products or related processes and producti ...

created in

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

and subsequently used in

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

, and other neighboring European countries. It has been retracted. The thread is used to join pieces of

electrical conduit An electrical conduit is a tube used to protect and route electrical wiring in a building or structure. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purp ...

and

cable gland A cable gland (more often known in the U.S. as a cord grip, cable strain relief, cable connector or cable fitting) is a device designed to attach and secure the end of an electrical cable to the equipment. A cable gland provides strain-relief ...

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

Overview

The standard, codified by the ''

Deutsches Institut für Normung ' (DIN; in English language, English, the German Institute for Standardisation) is a Germany, German non-profit organization and acting as national organization for standardization. DIN is the German International Organization for Standardizat ...

'' (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 In mechanical engineering, the thread angle of a screw is the included angle between the Threading (manufacturing), thread flanks, measured in a plane containing the thread axis.. This is a defining factor for the shape of a screw thread. Standar ...

of 80° is used. The ''

Verband der Elektrotechnik, Elektronik und Informationstechnik The VDE e. V. () is a German technical-scientific association. ''VDE'' is best known for creating and maintaining standards in the field of electric safety and has a strong influence on the Deutsches Institut für Normung, DIN (German Institute ...

'' (VDE) originally standardized the thread for use with conduit and cable glands that were made of

steel Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high Young's modulus, elastic modulus, Yield (engineering), yield strength, Fracture, fracture strength a ...

. Today the thread is used with both steel (typically

plated Plating is a finishing process in which a metal is deposited on a surface. Plating has been done for hundreds of years; it is also critical for modern technology. Plating is used to decorate objects, for corrosion inhibition, to improve solderab ...

to resist rusting) and

polyvinyl chloride Polyvinyl chloride (alternatively: poly(vinyl chloride), colloquial: vinyl or polyvinyl; abbreviated: PVC) is the world's third-most widely produced synthetic polymer of plastic (after polyethylene and polypropylene). About 40 million tons of ...

(PVC). Beginning in 2000, the VDE standard for cable glands (VDE0619) was formally replaced by EN50262. 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 pitch. Similarly, conduit threads were replaced by EN60423. Even today, ''Panzergewinde'' cable glands are still often found on

chemical reactor A chemical reactor is an enclosed volume in which a chemical reaction takes place. In chemical engineering, it is generally understood to be a process vessel used to carry out a chemical reaction, which is one of the classic unit operations in che ...

s and

bioreactor A bioreactor is any manufactured device or system that supports a biologically active environment. In one case, a bioreactor is a vessel in which a chemical reaction, chemical process is carried out which involves organisms or biochemistry, biochem ...

s (for example, PG13.5 thread for screwing in sensors) and various other equipment, enclosures,

junction box An electrical junction box (also known as a "jbox") is an enclosure housing electrical connections. Junction boxes protect the electrical connections from the weather, as well as protecting people from accidental electric shocks. Functions of ...

es, and connectors.

Overview

Gland sizes

See also