Screw M4 x 8 mm with Pozi-slot nickel plated

T-Slot Nut 5 St M4 Slot 5 - Type I

Screws Connecting Screw, with Combi Slot for PZ2 Cross Slot or Flat-Bladed Screwdrivers, M4 Thread

m4up slot M4 T-Slot Nut with spring

m4win slot M4 x10 CSK SLOT MT ZP