bought an older (there all old)reciever sight for my 1896 . like most , after removing the side plate screw it is attached to the reciever with that screw. unfortunately that screw is a little short. it only grabs by about 2 threads. here's my problem this sight (no name) is made so that in order to remove the bolt for cleaning; i have to run the elevation all the way up and remove that part off the sight. no other way. i would rather remove the sight by taking out the screw. but with only a couple threads holding i think that they will "strip" after  x number of removal's. can anyone tell me what the thread pitch is; maybe i can make one on the lathe. or, better yet tell me where i might buy a longer screw. ( i'm not really very good on the lathe. and last before anyone asks. no the sight does NOT slide out like lymans and other manufactures. any help??