ITEM NAME:M3x0.5mm Zinc Plated Nylon Insert Hex Lock Nuts Black 100pcs Q6N8 M3x0.5mm Zinc Plated Nylon Insert Hex Lock Nuts Black 100pcs Q6N8 Thread Size: (Female)M3; Product Name: Nylon Lock Nuts Material: Zinc Plated; Main Color: Black Height: 4mm/0.16" Width Across Flats: 0.55mm;Width Across Corners: 6mm/0.24" 1.Hex head, female threaded inside, metal material, anti-loose hex nut. 2.Used with a machine or cap screw for mechanically joining materials together. 3.Used widely for matching screws or bolts. Package Content: 100(+/-2%)Pcs x Nylon Lock Nuts Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm..Material: Zinc Plated;.