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Thread angle

Angle between flanks of a screw thread

Summary

Angle between flanks of a screw thread

Diagram of a thread angle

In mechanical engineering, the thread angle of a screw is the included angle between the thread flanks, measured in a plane containing the thread axis. This is a defining factor for the shape of a screw thread. Standard values include:

Name	Code	Angle	Profile	Standards
Most V-threads	M	60°	[[File:Spitzgewinde.jpg	120px]]	including DIN 13 / ISO, NPT and UTS
Whitworth threads	W	55°	[[File:Whitworth-Gewinde.jpg	120px]]	DIN 49301 / BS
British standard pipe thread	G	55°	[[File:Rohrgewinde.jpg	120px]]	DIN / BS / EN / ISO 228-1 / ISO 7-1
National Pipe Thread	NPT	60°	[[File:NPT_Dimensions.svg	120px]]	ASME B1.20.-1983 Pipe Threads, General Purpose, Inch
{{plainlist		Rd	30°	[[File:Rundgewinde.jpg	120px]]	DIN 405 / DIN 20400
Acme thread		29°	[[File:Acme thread.svg	120px]]	ASME/ANSI B1.5-1988
Metric trapezoidal threads	Tr	30°	[[File:Trapezgewinde 2.jpg	120px]]	DIN 103
Buttress threads	S	45°	[[File:Buttress thread form.svg	120px]]	DIN 2781
German buttress threads	S	30°	[[File:Saegengewindeprofil.jpg	120px]]	DIN 513
Square threads	Sq	0° (parallel)	[[File:Flachgewinde.jpg	120px]]	?
Panzergewinde, "steel conduit thread"	Pg	80°	[[File:Stahlpanzerrohrgewinde.jpg	120px]]	DIN 40430
British Association (BA) thread	BA	47°30'= °	[[File:British Association Thread Profile.gif	90px]]	BS 93:2008
Löwenherz thread		53°8'≈ °
Bodmer thread		50°
Thury thread		47°30'= °

References

List of DIN standards

Notes

Bibliography

References

{{Harvnb. Bhandari. 2007
[https://journeymans-workshop.uk/whitworth.php BS 84: 1956]
[http://www.gewinde-normen.de/en/knuckle-thread-din-405.html Knuckle Thread DIN 405]
[http://www.gewinde-normen.de/en/knuckle-thread-din-20400.html Knuckle Thread DIN 20400]
[http://www.bornemann-gewindetechnik.de/en/products/threading-technology/knuckle-threads.html Bornemann]
[http://www.bornemann-gewindetechnik.de/dateien/pdf/en/Rundgewinde_2_ZG.PDF Knuckle thread]
{{Harvnb. Bhandari. 2007
[http://www.gewinde-normen.de/en/loewenherz-thread.html Löwenherz thread]
[http://www.gewinde-normen.de/en/bodmer-thread.html Bodmer thread]
Brooks, Randall C. "Standard Screw Threads for Scientific Instruments. Part 1: Production Techniques and the Filière Suisse." ''History and Technology,'' vol 5, 1988, pp. 68.
[https://www.gewinde-normen.de/en/thury-thread.html Thury thread]

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

screws metalworking-terminology threading-(manufacturing)

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