Document Type and Number:
Japanese Patent JPS5329780
Kind Code:
B2
Abstract:
A symmetric screw thread system including external threads each profiled to have a flank angle of (70 +/- 2) DEG and a flat root located at (0.27 +/- 0.02)H from an intersecting point of two lines extended from opposing flanks of two adjacent threads and connected to said opposing flanks through arcs of a radius (0.15 +/- 0.02)p where H is the depth and p is the pitch of the threads. Alternatively, the system may include external threads configured to have a flank angle of (106 +/- 5) DEG and connected by a root having a radius of (0.30 +/- 0.01)p.
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Application Number:
JP10857274A
Publication Date:
August 23, 1978
Filing Date:
September 20, 1974
Export Citation:
International Classes:
F16B33/04; F16B33/02