---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Sun 12/30/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:49 PM - Looking for Countersink for 4-40 Screws that allows "tapping" for screw threads (Garey Wittich) ________________________________ Message 1 _____________________________________ Time: 06:49:06 PM PST US From: Garey Wittich Subject: RV-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.