Thread Restoring Files ~ Fixing Auger Bit Pilot Threads ~ by Old Sneeloc...

Shank, rolled thread, undersized shank, pitch,
pitch diameter, major diameter, classes, lead, minor diameter, cut thread, Class
1A, Class 1B, Class 2A, Class 2B, Class 3A, Class 3B, Class 4

Class 5, torque, acme, Whitworth, external thread, metric, thread file,