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Cylindric whitworth-pipe threads ACC. DIN/ISO 228

Thread:   Whitworth-pipe thread acc. DIN/ISO 228
 
Abbreviation:   G
 
Designation:   ISO 228-G 1/2"
ISO 228-G 1/2" A
 
Type of thread:   inner thread cylindric
outside thread cylindric (Tol. class A)
 
Application:   Pipe thread, for connections not sealing in the thread
Description:   This thread suits mainly for a mechanical connection of fittings and armatures. The sealing of the connection will be effected by a mechanical pressing-connection of the two sealing surfaces outside of the threads or via intersertation of a suitable seal. The screw-in tap of size A (with sealing ring), of the size B (with sealing rim) and of size E (acc. special agreement) and the correspondent screwing in holes of size X (with discharge) and size Y (with nut), each acc. DIN 3852 part 2 (see pages 8 - 9) show G-threads acc. to this norm.


thread   number of threads   P   h   max. outside Ø to suit male threads   effective Ø   min. core Ø to suit female threads   i
 
G 1/8"   28   0,907   0,581   9,728   9,147   8,566   8
 
G 1/4"   19   1,337   0,856   13,157   12,301   11,445   12
 
G 3/8"   19   1,337   0,856   16,662   15,806   14,950   12
 
G 1/2"   14   1,814   1,162   20,955   19,793   18,631   14
 
G 5/8"   14   1,814   1,162   22,911   21,749   20,587    
 
G 3/4"   14   1,814   1,162   26,441   25,279   24,117   16
 
G 1"   11   2,309   1,479   33,249   31,770   30,291   18
 
G 1 1/8"   11   2,309   1,479   37,897   36,418   34,939    
 
G 1 1/4"   11   2,309   1,479   41,910   40,431   38,952   20
 
G 1 1/2"   11   2,309   1,479   47,803   46,324   44,845   22
 
G 1 3/4"   11   2,309   1,479   53,746   52,267   50,788    
 
G 2"   11   2,309   1,479   59,614   58,135   56,656   24
 
G 2 1/4"   11   2,309   1,479   65,710   64,231   62,752    
 
G 2 1/2"   11   2,309   1,479   75,184   73,705   72,226    
 
G 2 3/4"   11   2,309   1,479   81,534   80,055   78,576    
 
G 3"   11   2,309   1,479   87,884   86,405   84,926    
 
G 3 1/2"   11   2,309   1,479   100,330   98,851   97,372    
 
G 4"   11   2,309   1,479   113,030   111,551   110,072    
 
G 4 1/2"   11   2,309   1,479   125,730   124,251   122,772    
 
G 5"   11   2,309   1,479   138,430   136,951   135,472    
 
G 5 1/2"   11   2,309   1,479   151,130   149,651   148,172    
 
G 6"   11   2,309   1,479   163,830   162,351   160,872