Metric Lock Nut Assortment Kit, 530Pcs Nylon Insert Lock Nuts Set, 304 Stainless Metric Locknuts Size: Lock nuts assortment kit are available in sizes, which are M2(50 pcs), M2.5(60 pcs), M3(160 pcs), M4(150 pcs), M5(56 pcs), M6(30 pcs), M8(10 pcs), M10(8 pcs), M12(6 pcs), 9 different sizes of locknuts to meet your needs in different scenario. 304 Stainless Steel Locknuts: 304(A2-70) Stainless steel locknuts are made of high-strength materials with good corrosion resistance and long service life. In addition, compared to galvanised nuts, they are more resistant to corrosion and oxidation, so they have a longer service life. Nylon Insert Lock Nuts: Locknuts embedded with nylon inserts, so that it and the bolt threads to form a close fit, and in the role of the elasticity of the nylon friction resistance, in order to achieve the purpose of anti-loosening. Superior vibration resistance, abrasion and shear resistance, as well as good performance under repeated use. Includes Storage Box: Comes with a clear storage box to keep 9 different sizes of metric nylock nuts sorted in the box for easy storage and use, and they are not easy to lose or confuse during use. Wide Application: Common uses for metric hardware nylon insert lock nuts include securing instrument and equipment components, linking pipes and structural elements.Suitable for use or maintenance in a wide range of applications such as furniture decoration, automotive repair, the mechanical industry and small repairsaround shops, construction, etc.