Small Parts 0202FPP Steel Thread Cutting Screw, Zinc Plated Finish, Pan Head, Phillips Drive, Type F, #2-56 Thread Size, 1/8" Length (Pack of 100)

I use (https://www.amazon.com/dp/B00GWZYJJ0?ref_=icdp_ba_mweb_sdfcx_pd_bap_m_grid_rp_0_3_gf&clientRefMarker=pd_bap_m_grid_rp_0_3_gf&heartsTeamIdentifier=buyagain&psc=1&heartDisabled=false) these self tapping screws. They have a phillips head but you should probably get some tapping fluid at your local hardware store and just use one drop before you start screwing the screws in. Once they’re in all the way you can screw and unscrew them if you need to change wheels etc