Thread type: 12-UN Unified National Thread Series ANSI B1.1

Das Gewinde der 12-UN Gewinde Tabelle gehört zur Unified National Fixed Pitch Series (UN) die wiederum ein Teil der Unified National Thread Series (UTS) ist. Es handelt sich dabei um eine Reihe amerikanischer Gewindenormen, die durch das American National Standards Institute (ANSI) festgelegt und überwacht werden. Die Werte der 12-UN Gewinde Tabelle richten sich nach der Norm ANSI B1.1. Wie Sie an der 12-UN Gewinde Tabelle gut sehen können, ist die Besonderheit der UN Serie die unveränderliche Gangzahl pro Zoll. Das bedeutet, dass alle Gewindegrößen über die gleiche Gangzahl verfügen, im Fall der 12-UN Gewinde aus der Tabelle handelt es sich dabei um 12 Gänge. Außerdem Teil der UN Serie sind noch Gewinde mit 4, 6, 8, 16, 20, 28 und 32 Gängen pro Zoll.

The 12-UN thread is an imperial thread with a 60° flank angle. As with all UN threads, the 12-UN thread table only covers those combinations of outside diameter and pitch per inch that are not already available in other thread standards such as UNC, UNF or UNEF. The 12-UN thread table therefore only contains special pitches for special applications. It is also noticeable that there are significantly fewer thread sizes in the 12-UN thread table than in the standards for other UTS threads. Due to the fixed number of threads per inch, not every combination of pitch and outside diameter makes sense. Only those variants that prove to be practical in use have been included in the 12-UN thread table.

The table for the 12-UN thread only contains thread sizes from an outside diameter of 1 1/16". The thread designation is made up of the outside diameter and the abbreviation 12-UN. Unlike other UTS threads, the number of threads per inch no longer needs to be added to the thread designation in the 12-UN thread table, as this is always 12. In our 12-UN thread table, we have listed the outer diameter in mm in addition to the information in inches if you want to work with metric data. In the 12-UN thread table you will also find the conversion of the number of threads per inch into mm, which in this case corresponds to 2.117 mm.