M4-M12Slot Socket Ball Point Grub Screw Slotted Ball Spring Plunger Tensile 12.9
M3 M4 M5-M16 Hex Socket Allen Head Spring Ball Set Screw Plunger Point Grub Bolt. -The ball point set screw is composed of spring, ball plunger and shell. M4 (4mm) / M5 (5mm) / M6 (6mm). 0.7mm(M4) / 0.8mm(M5) / 1mm(M6).