Mechaniker (Siemens & Halske)

screw thread series

In use as late as 1925. "Post-gewinde" = Postal screw, a size in use by the Reichspost.

Number Diameter
in mm
Pitch
in mm
Threads
per inch
deg Comment
1 15.84 0.8965 28 1/3 75  
2 13.07 1.0160 25 52  
3 12.30 1.4711 17 17/64 54  
4 11.37 1.8246 13 23/25 59  
5 11.02 1.0477 24 8/33 52  
6 10.86 1.3170 19 2/7 57  
7 10.16 0.9596 26 8/17 66  
8 9.40 1.1545 22 52  
9 9.24 1.2543 20¼ 55  
10 8.91 1.5804 16 1/14 58  
11 8.965 1.2192 20 5/6 50 post-gewinde
12 8.75 1.4962 16.368/377 57  
13 8.28 0.9721 26 4/31 52  
14 7.20 1.0367 24½ 58 post-gewinde
15 6.64 0.6047 42 58  
16 6.28 1.1723 21 2/3 62  
17 6.00 0.8965 28 1/3 55 post-gewinde
18 5.75 0.7815 32½ 48 post-gewinde
19 5.58 1.0367 24½ 62  
20 5.30 0.5229 48 4/7 53  
21 5.12 0.7815 32½ 58 post-gewinde
22 4.67 0.5229 48 4/7 62  
23 4.21 0.4127 61 7/13 60  
24 4.21 0.7968 31 7/8 63  
25 4.00 0.6684 38 61 post-gewinde
26 3.43 0.5941 42¾ 55  
27 3.37 0.6684 38 68 post-gewinde
28 2.89 0.6684 38 68  
29 2.80 0.5347 47½ 66 post-gewinde
30 2.61 0.5027 50 10/19 58  
31 2.16 0.4980 51 68 post-gewinde
32 1.80 0.4141 61 1/3 75  
33 1.78 0.3463 73 1/3 59 post-gewinde
34 1.63 0.3023 84 55 post-gewinde
35 1.38 0.2822 90 72  
36 1.22 0.2260 112 9/26 50 post-gewinde

Thread data contributed by Job Visser, who suggested this entry.

Georg W. Berndt.
Die Gewinde; ihre Entwicklung, ihre Messung und ihre Toleranzen.
Berlin: J. Springer, 1925.
Page 115.

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