Metric ISO Thread under 1 mm according to DIN 14-2

The metric ISO thread according to DIN 14-2 includes a range of very small thread dimensions, mainly used in precision mechanics and in the jewelry and watch industry. In the hobby sector, metric ISO threads according to DIN 14-2 are required for model building or in the field of microelectronics. The metric ISO thread DIN 14-2 is distinct from the term 'miniature thread'.

Miniature threads are already referred to as such when the external diameter is 2.6 mm or smaller. Up to the size of 1 mm, these miniature threads correspond to the DIN 13-1 standard for the normal metric standard thread. Only at sizes below this does the scope of DIN 14-2 begin.

The thread according to DIN 14-2 is a metric thread, so dimensions are given in mm. The flank angle is 60°. The pitch, which is the distance between two thread peaks, is also noted in mm. Due to the particularly small dimensions of the metric ISO thread according to DIN 14-2, the finer tolerance class 4H is often used instead of the usual 6H.

The thread designation consists of the abbreviation M, the external diameter, and the pitch. Despite the identical abbreviation, the metric ISO thread according to DIN 14-2 is easily distinguished from the metric standard thread due to its noticeably small dimensions. A thread designation for this thread might be, for example, M 0.3 x 0.08.

The table for the metric ISO thread according to 14-2 includes only eight sizes from 0.30 mm to 0.90 mm. In the table below, in addition to the external diameter and pitch, the core hole diameter in mm is also listed. This value is necessary for pre-drilling an appropriate core hole for threading. Links in the table will direct you to suitable dies and taps for the metric ISO thread according to 14-2.