Siemens and Halske Thread

German electrical engineering company that later became part of Siemens AG. Siemens & Halske Thread was used in telephones around 1900 AD.

Siemens and Halske
Thread No.Major Diameter mmTapping Drill Size mmPitch mmThread Angle °
118,957,01,2150
147,205,71,0558
176,004,60,8955
185,754,50,7858
215,124,00,7858
254,003,180,6661
273,372,580,6668
292,802,220,5366
312,161,630,4968
331,781,390,3459
341,631,290,3055
361,220,950,2250

See also: Thread.

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Subjects: Fixings and Fasteners