Method for roll pointing a threaded screw

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Details

10 4, 10 9, B21H 302

Patent

active

043015638

ABSTRACT:
A method for making a pointed, threaded fastener by threading, tapering and pointing in thread rolling equipment a screw blank having a cavity extending longitudinally into the blank from the end of the shank.

REFERENCES:
patent: 1232876 (1917-07-01), Wilcox
patent: 2162891 (1939-06-01), Johnson
patent: 2314391 (1943-03-01), De Vellier
patent: 2636194 (1953-04-01), Schneider
patent: 2652577 (1953-09-01), Chiaberta
patent: 3196654 (1965-07-01), Gordon
patent: 3517542 (1970-06-01), Skiecski
patent: 3728750 (1973-04-01), Stillman et al.
patent: 4149287 (1979-04-01), Skiecski

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