Thread SizeFemaleM2 Product NameNylon Lock Nuts MaterialZinc Plated Weight13g Main ColorSilver Hex head female threaded inside metal material anti-loose hex nut Used with a machine or cap screw for mechanically joining materials Used widely for matching screws or Made of metal material full threaded rod The most economical and most common form of Threaded Rod Typically used by the plumbing and contracting trades Used in maintenance departments in applications Height3mm012 inch Width Flats4mm016 inch Width Corners43mm017 inch Package Content50 x Nylon Lock Nuts Note Light 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 - 1-3cm