Thread angle

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Diagram of a thread angle

The thread angle of a screw is the angle between the threads.[1] This is a defining factor for the shape of a screw thread. Standard values include:

Thread standard Thread angle Profile Letter code Standards
Most V-threads
(including ISO, NPT and UTS)
60° Spitzgewinde.jpg M DIN 13 / ISO ? / ASME/ANSI ?
Whitworth threads 55° Whitworth-Gewinde.jpg W DIN 49301 / BS ?
Pipe thread
British standard pipe thread
55° Rohrgewinde.jpg G DIN / BS / EN / ISO 228-1 / ISO 7-1
Knuckle thread / round thread[2][3][4] 30° Rundgewinde.jpg[5] Rd DIN 405 / DIN 20400
Acme thread[6] 29° Acme thread.svg ? ASME/ANSI B1.5-1988[7]
Metric trapezoidal threads[1] 30° Trapezgewinde 2.jpg Tr DIN 103
Buttress threads[6] 45° Buttress thread form.svg S DIN 2781
German Buttress threads[6] 30° Saegengewindeprofil.jpg S DIN 513
Square threads[1] Flachgewinde.jpg Sq  ?
Steel conduit thread
aka Panzergewinde
80° Stahlpanzerrohrgewinde.jpg Pg DIN 40430
Löwenherz thread[8] 53° 8' ?  ? ?
Bodmer thread [9] 50°  ?  ?  ?

References[edit]

Notes[edit]

Bibliography[edit]