I have seen "1/2-14 NPT female" words. What do they mean? Where I can get information about them on Internet?

Answer 1

#NPT- National Pipe Thread Taper-Female thread.It means internal thread.
- Dimensional standard:ANSI B1.20.1

#Characteristics of NPT (also known as ANSI/ASME B1.20.1 Pipe Threads, General Purpose):

tapered thread 1 deg 47'
truncation of roots and crests are flat
60 Deg. thread angle
pitch is measured in threads per inch .

#Female Thread:[Internal Thread]- "1/2-14 NPT female"
ID of a component =45/64 Inch.or (0.703) inch. as drill size is 45/64 inch.
#Pipe Size(inches):1/4"
Threads per Inch[TPI] - pitch is 14.
Outside Diameter,OD,(inches) is 0.840".

http://icrank.com/cgi-bin/pageman/pageout.cgi?path=/chart_npt.htm&t=2
#Male Thread :
The 3/4" NPT pipe thread has 14 threads per inch. Both the TPI and OD of the thread are required for positive identification of thread size because more than one size have the same TPI.


http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html
http://en.wikipedia.org/wiki/National_pipe_thread
http://www.colder.com/Portals/0/pdfs/NPT.pdf

Answer 2

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Answer 3

I believe that these are threads. female means that the threads are cut into the inside something, so that you can screw the same size male threads into it. 1/2" is the diameter of the hole that the threads are in. Npt is the thread type. 14 is 14 threads per inch.

Here's a good website

http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html

Answer 4

1/2" is the diameter

14 means 14 thread per inch

Female means the other piece of pipe screws into it.

We can supply NPT thread gauges

http://www.gaugestools.com/npt-thread-gauges/

Answer 5

it is for Pipe Size and tapered connections

1/2 in is the nominal pipe size
14 is 14 threads per inch..
Female means it is the reciever of the connector -- the other piece of pipe screws into a female connector

Answer 6

Hi. It's a specification for pipe threads. The "1/2" is the I.D. I think, the "14" is the threads per inch. The thread tapers but I no longer have my "Machinist's Handbook" to tell you how much.

Edit: Found this link: http://www.eldonjames.com/frames/thread.html

Answer 7

1/2" nominal size (diameter) pipe with 14 threads that are visible on the outside (female piece). this way the pipe will screw INTO another pipe fitting.