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

screw thread A screw thread, often shortened to 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 ...

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

technical standard A technical standard is an established 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 production methods, ...

created in

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwee ...

and subsequently used in

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

, 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 It has been retracted.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 purpo ...

and cable glands. 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, the German Institute for Standardisation Registered Association) is the German national organization for standardization and is the German ISO member body. DIN is a German Registered Association ('' e.V.'') headquartered ...

'' (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 The thread angle of a screw is the included angle between the thread flanks, measured in a plane containing the thread axis.. This is a defining factor for the shape of a screw thread A screw thread, often shortened to thread, is a helical str ...

of 80° is used. The '' Verband der Elektrotechnik, Elektronik und Informationstechnik'' (VDE) (which began as a

trade association A trade association, also known as an industry trade group, business association, sector association or industry body, is an organization founded and funded by businesses that operate in a specific industry. An industry trade association partic ...

for standardization in electrical engineering) originally standardized (and named) the thread for use with conduit and cable glands that were made of

steel Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistan ...

, although today the thread is used with both steel (typically

plated Plating is a surface covering in which a metal is deposited on a conductive 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 improv ...

with combinations of nickel, zinc, or tin to resist rusting) and polyvinyl chloride (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 chem ...

s and

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

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

Overview

Gland sizes

See also