“Product Name: Lock Nuts; Package Content: 4pcs x Lock Nuts Main Color: Silver Tone; Material: 304 Stainless Steel Weight: 59g; Thread Diameter: M12 / 0.47"” Thread: 1.25mm pitch; Measurement system: metric system Hex Size: 19 x 8mm / 0.75"" x 0.31" " (W*T); total height: 12mm / 0.47"" Description: metric thread pitch: 1.25mm made of 304 stainless steel, give good strength Corrosion resistant. Used in many applications, near home, farm, business, automotive, in industry."