This is the M5 long threaded stylus #A-5555-0087. It has a long threaded styli that is 12.5mm. It has a stainless steel base, tungsten carbide stem, and ruby ball.
|Ball diameter (DK)||0.8 mm|
|Overall length (L)||22.3 mm|
|EWL (ML/ML1)||13.3mm/ 4.8 mm|
|Stem diameter (DS/DS1)||1.0 mm/ 0.6 mm|
|Base diameter (DG)||11.0 mm|
|Stem Material||Tungsten Carbide|