Teoria,

http://www.engineersedge.com/hardware/t ... hreads.htm
http://www.gewinde-normen.de/en/npt-pipe-thread.html
http://www.thegagestore.com/docs/HowToU ... _Gages.htm
http://www.alphathreadgage.com/refsheet ... m#internal
http://www.engineeringtoolbox.com/npt-n ... d_750.html
http://www.ostermfg.com/refchart3.html
http://withfriendship.com/user/sathvi/N ... thread.php
http://www.fittechengg.com/weld%20fitti ... anges.html
http://mdmetric.com/tech/thddat19.htm
http://www.plumbingsupply.com/pipethreadsizing.html
http://www.jgbhose.com/technical-refere ... length.asp
http://www.colder.com/Portals/0/Library ... epaper.pdf
http://www.ring-plug-thread-gages.com/t ... s-NPTF.htm
http://www.engineershandbook.com/Tables/npttap.htm


Kalkulator gwintowania
http://www.americanmachinist.com/Calcul ... tting.aspx
http://www.newmantools.com/tapdrill.htm


gwintowniki są,

Polska
http://www.narzedzia-24.pl/Fanar-m10/Gw ... ,A239.html
http://www.narzedziowiec.com.pl/compone ... Itemid,37/
http://www.pronar.com.pl/katalog/?id_ca ... roductList
http://narzedziowy24.eu/category/gwinto ... iki-calowe http://narzedziowy24.eu/gwintownik-npt- ... -2-14.html
http://www.viktorex.pl/oferta,1
http://www.fanar.pl/oferta.php?nr=14&lang= http://www.fanar.pl/katalogi/Katalog09_2rozdz2.pdf


http://www.burntlatke.com/lp.html

http://www.lelong.com.my/thread-maker-t ... Sale-I.htm

http://www.alibaba.com/product-gs/30264 ... d_Tap.html

http://www.makinatakim.com.tr/en-US/hss ... tails.aspx
http://www.tradevv.com/chinasuppliers/s ... d-tap.html
http://www.denlorstools.com/home/dt1/pa ... den_c.html
http://www.garvintools.com/index.cfm?md ... egoryID=11
http://www.use-enco.com/CGI/INSRIT?PART ... NO=2619722

metoda nacinania na tokarce również,

http://www.practicalmachinist.com/vb/ge ... he-201212/

za pomocą liniału, (produkcyjna za pomocą noża)

i narzynki
http://www.home-barista.com/levers/la-p ... 3-150.html


Narzynki str. 18/20
http://www.fanar.pl/katalogi/Katalog09_2rozdz4.pdf
http://www.awar.pl/index.php/pMenuId/6/pCatId/79