Cap Nut Cover Type Nut Acorn Nut Hex Domed Cap Nut M3 to M6,50-piece (M6, pitch 1.0 mm) Stainless Steel Cap Nuts,50 piece,Metric Nuts M3 Cap Nut can fit to the Thread Dia. 3mm screws,Thread pitch 0.5 mm M4 Cap Nut can fit to the Thread Dia. 4mm screws,Thread pitch 0.7 mm M5 Cap Nut can fit to the Thread Dia. 5mm screws,Thread pitch 0.8 mm M6 Cap Nut can fit to the Thread Dia. 6mm screws,Thread pitch 1.0 mm