Acorn Nuts Size: Black nylon cap nuts are available in sizes: M3(70pcs), M4(35pcs), M5(20pcs), M6(16pcs), M8(8pcs), M10(6pcs), 155 pieces in total.6 different sizes to meet your needs in different scenarios,High Quality Nylon: Cap nuts is made of high quality nylon material, which has high mechanical strength, good toughness, high tensile and compressive strength. It is also a flame retardant material,Multi-Purpose: Dome head hex nuts can protect screws, bolts and screws very well. It can effectively prevent moisture, dust, etc. from entering, so as to prevent rust, which helps to extend the service life of screws, bolts and screws,Convenient storage: Each of the 6 different sizes of metric acorn nuts are individually stowed by type in an easy to carry clear case.Easy to store and use,so that the plastic nut caps will not be lost or mixed up during use,Wide Application: Acorn dome nuts are widely used in a wide range of fields such as furniture decoration, automotive repair, wind power and electricity, office, marine, construction and other areas of use or maintenance