US PATENT SUBCLASS 470 / 185
.~ Screw threading die
Current as of:
June, 1999
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470 /
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THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS
183
DF
IMPLEMENT, E.G., DIE, ETC.
{10}
185
.~ Screw threading die {2}
186
DF
.~.~
> Thread trimmming
187
DF
.~.~
> Radial chaser {2}
DEFINITION
Classification: 470/185
Screw threading die:
(under subclass 183) Subject matter wherein the device is specially adapted for forming an external ridge on a fastener.