Threads: Need to Know for Part Order to be fulfilled
Thread readings contain much information e.g., diameter, length, angle, pitch, and direction.
Many different standards are in use and interpreted by Werk24. Potentially your use case even needs to differentiate between internal and external threads.
Ignoring the differences may result in accepting a part order that cannot be fulfilled due to the lack of the required tool.
Classification levels of threads
Position of Thread on the Part
External Threads
Internal Threads
Helix Direction of the Thread
Handedness refers to the ability of a thread's helix to twist in two different directions. When viewed from a point of view on the axis through the center of the helix, most threads are oriented so that the threaded item moves away from the observer when turned clockwise and towards the viewer when turned counter-clockwise. Because it follows the right-hand grip rule, this thread is known as a right-handed (RH) thread. Left-handed threads are those that are orientated in the other direction (LH).
Type of threads
Threads are categorized in many types. We can identify following types of threads:
M - ISO THREAD (METRIC)
American pipe threads (NPT (National Pipe Thread)/NPTF (National Pipe Thread Fuel))
UNC/UNF - UNIFIED NATIONAL THREAD - SAE or Unified threads (UN/UNF)
G/R/RP - WHITWORTH THREAD - BSPP (British Standard Pipe Parallel Thread)
Other Types:
British Association (B.A.) thread
Square thread
Acme thread
Knuckle thread
Buttress thread