[M2.5]
Knurling Thumb Nut Hand Tightening Nut M2 Diameter 5mm, Height 5mm M2.5 Diameter 5mm, Height 5mm M3 Diameter 8mm, Height 6mm M4 Diameter 8mm, Height 6mm M5 Diameter 10mm, Height 8mm M6 Diameter 10mm, Height 8mm