Thread Types: Difference between revisions

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=Short List=
=Short List=
*NST - National Standard Thread. Same as GHT (Garden Hose Thread) or NH (National Hose)
Summary - there is National Hose and National Pipe as the main 2 types of threads. National Pipe can be tapered or straight, while National Hose is not tapered.
*GHT - garden hose, used also in fire hose [https://rawhidefirehose.com/blog/guide-fire-hose-couplings-threading/#:~:text=NH%2FNST%20Threads,also%20referred%20to%20as%20NH.]. Same threads per inch as NPT, but not tapered.
*{{check}}National Hose (NH) = National Standard Thread (NST) = National Hose Thread (NHT). It is often referred to as “fire hose thread”.  - [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=is+nst+thread+same+as+NH+thread&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]
*NPSH - same as NPS [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=is+NST+thread+compatible+with+NPS+thread&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]. Compatible with NPT [https://rawhidefirehose.com/blog/guide-fire-hose-couplings-threading/#:~:text=NH%2FNST%20Threads,also%20referred%20to%20as%20NH.]. NPSH has the same threads per inch as NPT, but without taper.  [https://firehosedirect.com/blogs/expert-help/fire-hose-nh-vs-npsh#:~:text=NST%20also%20goes%20by%20the,the%20threads%20do%20not%20taper.]. Verified here [https://www.alpineskids.com/post/thread-guide]. {{check}}
*GHT - garden hose Thread, ''Garden hose thread (GHT) is also referred to as NH.''  [https://rawhidefirehose.com/blog/guide-fire-hose-couplings-threading/#:~:text=NH%2FNST%20Threads,also%20referred%20to%20as%20NH.]. Same threads per inch as NPT, but not tapered.
*'''NPSH''' - '''national pipe straight hose''' - same as NPS [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=is+NST+thread+compatible+with+NPS+thread&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]. Compatible with NPT [https://rawhidefirehose.com/blog/guide-fire-hose-couplings-threading/#:~:text=NH%2FNST%20Threads,also%20referred%20to%20as%20NH.]. NPSH has the same threads per inch as NPT, but without taper.  [https://firehosedirect.com/blogs/expert-help/fire-hose-nh-vs-npsh#:~:text=NST%20also%20goes%20by%20the,the%20threads%20do%20not%20taper.]. Verified here [https://www.alpineskids.com/post/thread-guide]. {{check}}
*NPS - National Pipe Straight, same as NPT, but straight. [https://netcamcenter.nl/media/documents/NPT-vs-NPS-pipe-thread.pdf]. NPS is not used for high pressure, while NPT can be, such as hydraulics. Does this mean that NPS and GHT are the same?
*NPS - National Pipe Straight, same as NPT, but straight. [https://netcamcenter.nl/media/documents/NPT-vs-NPS-pipe-thread.pdf]. NPS is not used for high pressure, while NPT can be, such as hydraulics. Does this mean that NPS and GHT are the same?
*NPSM - National Pipe - Straight Mechanical - closure attained by 30 degree compression fit with a swivel - [http://pressureconnections.com/customer/prcoco/customerpages/literature/Steel_NPSM_Female_Pipe_Swivel.pdf]. Only NPT with chamfer will seal properly with NPSM - other NPT threads may not seal.
*NPSM - National Pipe - Straight Mechanical - closure attained by 30 degree compression fit with a swivel - [http://pressureconnections.com/customer/prcoco/customerpages/literature/Steel_NPSM_Female_Pipe_Swivel.pdf]. Only NPT with chamfer will seal properly with NPSM - other NPT threads may not seal.
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*UN - [https://www.thehopegroup.com/blog/advice/learn-all-about-different-types-of-threads/#:~:text=However%2C%20threads%20and%20connections%20are,BSPP%20(BSP%2C%20parallel)]
*UN - [https://www.thehopegroup.com/blog/advice/learn-all-about-different-types-of-threads/#:~:text=However%2C%20threads%20and%20connections%20are,BSPP%20(BSP%2C%20parallel)]
*SAE - with o-rings
*SAE - with o-rings
=Specifications=
*3/4" NPT is 14 threads per inch. [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=threads+per+inch+for+3%2F4%22+NPT&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]
*GHT has 11.5 TPI [https://www.fittings.space/technical-info/npsh-nh-nhr-fittings]


=Long List=
=Long List=
Probably hundreds exist all together.
Probably hundreds exist all together.

Latest revision as of 16:49, 19 March 2024

Short List

Summary - there is National Hose and National Pipe as the main 2 types of threads. National Pipe can be tapered or straight, while National Hose is not tapered.

  • Check.pngNational Hose (NH) = National Standard Thread (NST) = National Hose Thread (NHT). It is often referred to as “fire hose thread”. - [1]
  • GHT - garden hose Thread, Garden hose thread (GHT) is also referred to as NH. [2]. Same threads per inch as NPT, but not tapered.
  • NPSH - national pipe straight hose - same as NPS [3]. Compatible with NPT [4]. NPSH has the same threads per inch as NPT, but without taper. [5]. Verified here [6]. Check.png
  • NPS - National Pipe Straight, same as NPT, but straight. [7]. NPS is not used for high pressure, while NPT can be, such as hydraulics. Does this mean that NPS and GHT are the same?
  • NPSM - National Pipe - Straight Mechanical - closure attained by 30 degree compression fit with a swivel - [8]. Only NPT with chamfer will seal properly with NPSM - other NPT threads may not seal.
  • NPT - National Pipe - tapered
  • R, G - [9]
  • BSPP - British Pipe thread parallel
  • BSPT - British Pipe thread tapered
  • Bolt thread - fine and course
  • Metric bolt - fine and course
  • Metric pipe straight
  • Metric pipe parallel
  • UN - [10]
  • SAE - with o-rings

Specifications

  • 3/4" NPT is 14 threads per inch. [11]
  • GHT has 11.5 TPI [12]

Long List

Probably hundreds exist all together.

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