#21 (0.1590") Diameter. 1.900" Working Length. 2.150" Body Length. 1/4-28 thread. Made of extra durable Cobalt Steel. Also used as replacement bit for the rivet removal tools (1341A & 1341S).
THREADED DRILL BITS
Specifications: 135° split-point angle prevents walking . 1/4-28 threaded shank . Surface treated to resist abrasion and minimize tendency of soft metals to load drill, making it ideally suited for drilling Aluminum and mild Steel
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#12 (0.1890") Diameter. 1.900" Working Length. 2.150" Body Length. 1/4-28 thread. Made of extra durable Cobalt Steel. Also used as replacement bit for the rivet removal tools (1341A & 1341S).
#30 (0.1285") Diameter. 1.900" Working Length. 2.150" Body Length. 1/4-28 thread. Made of extra durable Cobalt Steel. Also used as replacement bit for the rivet removal tools (1341A & 1341S).
#40 (0.0980) Diameter. 1.900" Working Length. 2.150" Body Length. 1/4-28 thread. Made of extra durable Cobalt Steel. Also used as replacement bit for the rivet removal tools (1341A & 1341S).