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Siemens & Halske Thread

Specifications of International Thread Standards

      Siemens & Halske Thread was used in telephones approx. 1900 AD.

Thread No.
 
 
Major
Diameter
mm
Tapping
Drill Size
mm
Pitch
mm
 
Thread Angle

 
11 8,95 7,0 1,21 50
14 7,20 5,7 1,05 58
17 6,00 4,6 0,89 55
18 5,75 4,5 0,78 58
21 5,12 4,0 0,78 58
25 4,00 3,18 0,66 61
27 3,37 2,58 0,66 68
29 2,80 2,22 0,53 66
31 2,16 1,63 0,49 68
33 1,78 1,39 0,34 59
34 1,63 1,29 0,30 55
36 1,22 0,95 0,22 50

Nut

  Washer
Screw Nut
 
 

 

© 1998 Conex Metals.

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