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Tap and Die Sets
ME = Model Engineer Threads
These come in 32 and 40 tpi sizes
No official across flats dimensions are given for ME ( Model Engineer ) threads as nuts and bolts are not commercially available
P = Pitch = 1/Number of threads per inch (tpi)
h = Angular Depth = 0.960491 x P
D = Depth of Rounding = 0.073917 x P
h/6 = Shortening = 0.160083 x P
d = Actual Depth = 0.640327 x P
r = Radius at the Crest & Root = 0.137329 x P
C = Core diameter = Major Diameter - 1.280654 x P
Effective or Pitch Diameter = Major Diameter - .640327 x P
Code]www.britishfasteners.com[/url][/url]
ME = Model Engineer Threads
These come in 32 and 40 tpi sizes
No official across flats dimensions are given for ME ( Model Engineer ) threads as nuts and bolts are not commercially available
P = Pitch = 1/Number of threads per inch (tpi)
h = Angular Depth = 0.960491 x P
D = Depth of Rounding = 0.073917 x P
h/6 = Shortening = 0.160083 x P
d = Actual Depth = 0.640327 x P
r = Radius at the Crest & Root = 0.137329 x P
C = Core diameter = Major Diameter - 1.280654 x P
Effective or Pitch Diameter = Major Diameter - .640327 x P
Code]www.britishfasteners.com[/url][/url]