This is the go-to source for wood screws in obsolete sizes needed for antique furniture restoration plus you can buy in small quantities. No.7 and no.9 screws can still be purchased new elsewhere, but their thread pitch, shank diameters, and head diameters are now significantly different from those made a century ago.

It has been 25 maybe 30 years since I have been able to purchase great old slotted screws. I wish I had known about you guys 20 years ago.