4.1.38 ISO Pipe threads, tapered: basic sizes

Terms relating to taper pipe threads

f04-45-9780750665087

ISO pipe threads, tapered: basic sizes (see Tables 1 and 2).

Table 1

Nominal (bore) size of pipe aNumber of threads per inchPitch of thread (mm)Depth of thread (mm)Basic diameters at gauge plane
in.mmMajor (gauge) diameter (mm)Pitch (effective) diameter (mm)Minor diameter (mm)
18si9_e6280.9070.5819.7289.1478.566
14si10_e8191.3370.85613.15712.30111.445
3810191.3370.85616.66215.80614.950 ...

Get Mechanical Engineer's Pocket Book, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.