[pa38112]

I can buy 100 degrees, and 120 degrees, but the only source I have found for a 110 degree countersink is $300. What are the rest of you using for attaching thin dimpled sheet to thick base stock? 100 or 120 would get the job done, but it does not seem right. I can't believe everyone is buying a $300 countersink, so I must be missing something...

 

[xavierm]

100 degree

Use the 100 degree. All the cutters that came in my tool kit are 100 degree.

 

[Rick_A]

For AN426 solid rivets, 100 degree counter sink is standard.

The RV-12 uses some pulled rivets that require a 120 degree counter sink.

 

[jrs14855]

countersinks

Aircraft Spruce has various piloted stop countersinks available at reasonable prices. Non piloted from mscdirect.com, most industrial hardware stores have the plain countersinks starting around $15-20

 

[JanRV6UK]

Use 100 deg .... for solid rivets ... 120 for 'pop' style pulled rivets ...