I had a hard time finding these screws for my 700R4. Here's the size:
M6.3-1.81 x 20mm
They have a 10mm head. Here are some for sale:
https://www.ebay.com/itm/30399200442...3ABFBM8Nyf9JZh
I bought some 25mm long screws from Napa. They threaded into the holes, but they were too long. I can't remember where I got the shorter screws I have in there now. I believe the correct Napa Balkamp part number for the 20mm length is 6652328.
https://www.napaonline.com/en/p/BK_6...pressionRank=1