M3 Flat Head Machine Screws and Hex Nuts Kit, 380 Pcs Black Countersunk Head Phi
Hex nuts provide a more precise fit, reduce stress and protect parts and screws. There is no confusion during transportation and it is convenient to use. 40 Pcs - M3 4mm. 40 Pcs - M3 6mm. 30 Pcs - M3 8mm.