I bought a sporterized 1917 No.1 Mk.3* and now have almost everything to bring her back to her original covering. All I need are the two screws which hold the front and buttstock swivels on as well as the front nose cap screw. Could someone tell me what tread pattern these are so I can go out and buy my own screws and modify them to look original rather then searching the internet looking for only a few screws? It would make a target shooter very happy. Thanks.