wolph33,
You will not find that screw size and thread pitch in any hardware store. It is an odd ball size Singer used. Very close to M7x1.25 TP "I Think". But even those are not findable.
Sew-Classics {
http://www.shop.sew-classic.com/Bolt...rank-50632.htm } has the screw you need and they usually come with the HC. Or you can ask most any LSMG cos they usually should have those screws.
Joe