1990-06-11
1991-07-30
Combs, E. Michael
B23G 702
Patent
active
050350196
ABSTRACT:
A cold-forming tap is disclosed with a triangular-shaped body when viewed on end with concentric threads cut into the corners of the triangular-shaped body.
REFERENCES:
patent: 1912517 (1933-06-01), Lapotterie
patent: 3775792 (1973-12-01), Leonard
Combs E. Michael
Nitkin William
North Attleboro Taps, Inc.
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