American Dryseal Pipe Threads (NPTF and NPSM)

American Dryseal Pipe Threads (NPTF and NPSM)

This commonly used connection incorporates two methods of sealing. The male NPTF (Dryseal) tapered thread will mate with the NPTF tapered female, which is usually a port, and seal when the special threads are crushed together. Male PTF (Short Dryseal) are identical to male NPTF threads except that the thread lengths have been shortened by one full thread from the small end of the taper. Additional sealing aids such as pipe dope and Teflon tape are often used with theses threads. If the male has a 30 seat it will mate with the 30 cone seat in the NPSM straight thread swivel female, usually found on adapters, and is mechanically held together by the threads. NPTF and NPSM are not interchangeable with the British pipe threads.

Click here for a guide on how to properly measure threads.

Click here for a printable, actual size pipe fitting profiles. You will need to have Adobe Reader to view and print the file.


American Dryseal Pipe Threads (NPTF and NPSM)
Dash
Size
Inch
Size
Thread Male
Thread
O.D.
mm
Male
Thread
O.D.
inches
Female
Thread
I.D.
mm
Female
Thread
I.D.
inches
2 1/8 1/8 - 27 10.3 .41 9.4 .37
4 1/4 1/4 - 18 13.7 .54 12.4 .49
6 3/8 3/8 - 18 17.3 .68 15.7 .62
8 1/2 1/2 - 14 21.3 .84 19.3 .76
12 3/4 3/4 - 14 26.9 1.06 24.9 .98
16 1 1 11-1/2 33.3 1.31 31.5 1.24
20 1-1/4 1-1/4 11-1/2 42.2 1.66 40.1 1.58
24 1-1/2 1-1/2 11-1/2 48.3 1.90 46.2 1.82
32 2 2 11-1/2 60.4 2.38 57.9 2.29


What is the "(+.18)" beside the item number I want to order in the drop down menu? ?





Click here to download an Adobe PDF version of our complete catalog. This catalog includes every fitting on our website. *Please note, this catalog is 112 pages so the file may take a minute or two to download depending on your computer speed and your internet connection download speed.




airbrake fittings | airline swivels | ball valves | bottle gas fittings | brass pipe fittings | bronze fittings | composite fittings | compression fittings | cross reference | double barb fittings | download catalog | eaton fuller fittings | faqs | fitting assortments | fitting finder chart | flareless fittings | garden hose fittings | grease whip hoses | grease zerks | hose barbs | hose clamps | hose ferrules | hose tools | hydraulic adapters | hydraulic couplers | hydraulic flanges | inverted flare fittings | metric adapters | push-to-connect fittings | plastic caps & plugs | quick couplers | re-coil air hose | rfq | reusables | sae 45 flare brass fittings | specials | stainless steel fittings | threaded sleeve | thread id | valves




For Experienced Technical Support
Contact the "Fitting Specialists"
Email: sales@FittingsandAdapters.com


Payment:






Tell Others About This Site

Send an email to a friend to let them know about this site by clicking here.




Privacy Policy