David, since I go by that name also, email me your address and I will send you one. Basically it is the same size thread (10-32) and only about a thread less than the side plate connecting screw. On Field Grades they get mixed up sometimes in dis-assembly, higher grades the side plate connecting screw is engraved. (slso to note, that the head of the side plate connecting screw isn't as thick (high) as the trigger plate housing to top tang.)

jdavidw1@comcast.net

David