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Screw size question

nohoflyer

Well Known Member
Patron
I “screwed up” and made some holes too big. They were supposed to accommodate some AN509-10R12 screws (#12)

My question is now that my holes are 1/4 inch (ouch) what size screw do I need to order to accommodate?
 
A .250 screw. Seriously a AN509-416XX. MS24694-SX is the new designation for AN509
Look at Aircraft Spruce under AN509 they have a chart with the various sizes
 
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I “screwed up” and made some holes too big. They were supposed to accommodate some AN509-10R12 screws (#12)

My question is now that my holes are 1/4 inch (ouch) what size screw do I need to order to accommodate?

AN509-10R12 is a #10 or 3/16th screw. Why do you say it's a #12? The part before the R is the diameter, the part after the R is the length.

But to answer the question, Vans sells AN509-416R12 screws. https://store.vansaircraft.com/1-4-28-x-25-32-flat-head-screw-an509-416r12.html
 
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