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1. 06:49 PM - Looking for Countersink for 4-40 Screws that allows "tapping" for screw threads (Garey Wittich)
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| Subject: | Looking for Countersink for 4-40 Screws that allows "tapping" |
for screw threads
I posed the original question. -The 4-40 screws I will be using (MS24693
formerly AN507) have the 100 Degree angle just like the the AN426AD rivets.
-The -Countersink I am looking for needs to have a 100 degree angle an
d have a 0.089" Diameter Guide Pin so the 0.089 Dia hole in the material ca
n be "Tapped" for the 4-40 screw threads after countersinking. -Using a 1
00 Degree Deburring Tool Bit will be too time consuming because of the numb
er of screws used. -Using #6 Screws or larger will be a problem. - Usin
g the Countersink made by Cleveland for 4-40 screws has too big a diameter
Guide Pin. - Any ideas where to get the above Countersink (100 Degree Ang
le and 0.089" Dia Guide Pin) ?? -Many thanks, -Garey Wittich
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