Inch Threads

 

What you should know about Inch Threads or Inch Screws you can find here.

 

Conversion inch in cm

  • 1 inch (Zoll) = 2,54 cm
  • 1 inch (Zoll) = 25,4 mm

Inch threads are defined by your gear number per inch. This, together with the thread diameter, is the basis for determining the thread type. Inch threads are defined by your gear number per inch. This, together with the thread diameter, is the basis for determining the thread type. For example, a 1/4" UNC - American coarse thread has 20 threads per inch, a 1/4" UNF - American fine thread has 28 threads.

A thread template or thread gauge can also be used to determine a thread. This is the easiest way to measure a thread and to determine it accurately.

 

Here you will find further technical information and a tightening torque table:

Example: UNC thread (American standard coarse thread)

 

Example:

1/4 Zoll - 20 x 1/2 inch hex bolt

1/4 = Thread outer diameter 6,35 mm

20 = number of threads per inch (25,4 mm) length

1/2 = length of screw from head 12,70 mm

 

Example: UNF Thread (American Standard Fine Thread)

 

Example:

1/4 Zoll - 28 x 1/2 inch hex bolt

1/4 = Thread outer diameter 6,35 mm

28 = number of threads per inch (25,4 mm) length

1/2 = length of screw from head 12,70 mm

 

Tip !

Here, tools to measure a thread.