发明授权
US4316683A Semi-circular thread tap 失效
半圆形丝锥

Semi-circular thread tap
摘要:
A tap for cutting threads in a hole which comprises a semi-circular tap body with threads cut in the circular surface extending to a diametrical surface. Modified embodiments include a rake angle at the cutting ends of the tap threads and a drill point to allow the device to serve as a drill and tap.
信息查询
0/0