RIVET NUT SIZE: In this set, we provide 12 size of rivet nut, includes: #6-32--300pcs, #8-32--200pcs, #10-24--150pcs, 1/4-20--100pcs, 5/16-18--50pcs, 3/8-16--20pcs, 1/2-13--10pcs, total 830pcs. FEATURE: Head Type: Flat Head; Nuts have a work-hardened surface providing high-strength, load-bearing threads. WIDE APPLICATION: Our rivet nuts are used to provide firm and problem-free attachment for screws and bolts in home improvement and for a wide range of manufacturing including automobiles, aircraft, appliances, furniture, decoration, and more. DURABLE QUALITY: These rivet nuts boast superior strength and offer corrosion-free, rotation-resistant performance and acid resistant thanks to their precision threading and quality construction from galvanized carbon steel.You will no longer worry about them rusting and breaking when installing. THICKENE AND CLEARLY-LABELED TOOL BOX: These nuts kit is lightweight, very convenient to carry. Meanwhile, the transparent