Specification Brand : Xujinsongg BulletPoint1 : Exquisite Material: These machine screws bolt and nuts are made of high-quality carbon steel with high strength and hardness, corrosion and rust resistance, smooth surface without burrs, not easy to break or deform, durable for use. BulletPoint2 : Countersunk Head Phillipe Design: The thread of black metric phillipe flat head screws bolts is clear and accurate, not easy to deform and shift during use, and not easy to loosen. Hex nuts provide a more precise fit, reduce stress and protect parts and screws. BulletPoint3 : Easy to Store: All countersunk flat head machine screws are stored in a transparent and sturdy storage box with compartments. Screw and nut set is stored separately, well organized, easy to carry and find. There is no confusion during transportation and it is convenient to use. BulletPoint4 : Multi-scenario Application: Suitable for home, office equipment industry, electronics industry, communication industry, machinery, maintenance, aircraft, ships, bicycles, motorcycles, automobiles, chemicals, and other fields. BulletPoint5 : Package Includes: 380pcs in total, size includes: 40 pcs m3*4mm, 40 pcs m3*6mm, 30 pcs m3*8mm, 30 pcs m3*10mm, 30 pcs m3*12mm, 30 pcs m3*16mm, 30 pcs m3* 20mm, 150 pcs nuts, the quantity is sufficient and the size is rich to meet the needs of daily use. Color : Black ExteriorFinish : Black ExternallyAssignedProductIdentifier1 : 008236181494 ExternallyAssignedProductIdentifier2 : 0008236181494 ExternallyAssignedProductIdentifier3 : 00008236181494 FinishType : Others GpsrSafetyAttestation : 1 GradeRating : Grade III IncludedComponents : The Hillman Group 121155 Metal Mirror Holder Kit, Steel ItemName : M3 Flat Head Machine Screws and Hex Nuts Kit, 380 Pcs Black Countersunk Head Phillips Screws Bolts Nuts Assortment Kit - M3 x 4mm/ 6mm/ 8mm/ 10mm/ 12mm/ 16mm/ 20mm ItemPackageDimensions_Height : 12.4968 centimeters ItemPackageDimensions_Length : 1.7018 centimeters ItemPackageDimensions_Width : 6.5024 centimeters ItemPackageQuantity : 380 ItemShape : Hexagonal ItemTypeKeyword : screw-and-bolt-assortment-sets Manufacturer : Wujinsongmy ManufacturerGrade : Grade III Material : Carbon Steel MetalType : Galvanised,Steel ModelName : The Hillman Group 121155 Metal Mirror Holder Kit, Steel ModelNumber : 1230lslm-12.9 MountingType : Wall Mount NumberOfItems : 380 NumberOfPieces : 380 PackageLevel : unit PartNumber : us-xjs-380-012 Pattern : Countersunk Socket Cap Bolts Screws ProductDescription : What are the advantages of our countersunk head machine screw kit?