What size screws do you need to mount a PARKER HALE 5c to a No4

[Robert303]

I'm sure this has been asked before but I cannot find the answer looking through previous postings re Parker Hale sights. I believe they are standard BA threads unlike those needed for the Parker Hale 5a sights used on the SMLE.
Thanks

Information

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[Mk VII]

a 3BA for the ejector screw and a 4BA for the other screw.

[Patt14 No2]

PM me if you want a set I have dozens of them.