May check it out if I remember my next visit. If the gent wanted some and I could have been guaranteed safe to mail I'd have sent them for free. I have enough grief to deal with as it is.
ETA it's A DEAD ISSUE!
You shouldn't have any issues screwing a 6-48 plastic screw into a 6-40 hole. Don't know if the person would want that or the aesthetics of original screws.
I doubt you could buy the ones that came with factory rifles at Ace Hardware. I haven't sent mail to another country for many many years so I have no clue how mail to overseas destinations is handled. On the off chance that it could be opened why leave the decision about what they are to some...
Should fit the holes left from removing the factory sights from the barrel I expect. I've been advised that the restrictions are for ALL gun parts. I'd posit that blued screws are used largely on guns so therefore largely a gun part.
I know the Guvmint is finicky about what gun parts or related items can be sent out of the country without their blessing. Any issue with sending screws used to plug up the holes in the receiver or barrel by mail to Sweden?