Early indications are the new MIM Player Series Strats may use uncommon fine threaded (UNF) USA screws, as used on US Standard Strat's from 2008 onwards.
Guitar Bridge Saddle Height Screws Metric M3x8 Gold for Guitars Bridge 12pcs
Guitar Bridge Saddle Height Screws M3x4 Silver for Electric Guitars Bridge 12pcs
Fender Stratocaster USA Strat Original Bridge Saddle Height Screws 099-4928-000
Musiclily Pro 12Pcs M3x8mm Stainless Steel Guitar Bridge Saddle Height Screws
Musiclily Ultra 12Pcs Nickel UNF#4-48x5/16" Guitar Bridge Saddle Height Screws
Bridge Saddle Height Screws, Low 8mm Black Steel Alloy, Fit Squier/Non USA Strat