1500 Pcs Flat Head Hex Socket Head Cap Screws Bolts And Nuts And Washers What are the advantages of our black nuts and bolts assortment kit? Exquisite Material: Our hex socket head screws bolts and nuts and washers are made of superb alloy steel material, high strength, rust resistant, good corrosion resistance in many environments, sturdy and durable for long-term use. Easy to Use: The countersunk head is designed to bear even force, no offset, not easy to slip, uniform pitch, clear threads, no residual burrs, and good grip on fixed threads. Nuts and washers can increase contact area and reduce stress to protect bolts and parts. Easy to Store: All hex head flat head screws bolts and nuts and falt washers are packaged in a plastic sturdy storage box with different lengths, a wide variety, well organized, easy to open and search, convenient to carry. Wide Range of Applications: Suitable for electronic products, household industry, faucet, lighting, repair, mechanical equipment, furniture and many other fields, such as agricultural machinery, engineering machinery, manufacturing, electrical products, gardening, model making, etc. Package Includes: 1500 pcs in total: 40 pcs m2x8mm, 40 pcs m2x12mm, 35 pcs m2x16mm, 35 pcs m2x20mm, 40 pcs m3x8mm, 40 pcs m3x12mm, 35 pcs m3x16mm, 35 pcs m3x20mm, 30 pcs m4x8mm, 30 pcs m4x12mm, 25 pcs m4x16mm, 25 pcs m4x20mm, 15 pcs m5x8mm, 15 pcs m5x12mm, 15 pcs m5x16mm, 15 pcs m5x20mm, 160 pcs m2 nuts, 160 pcs m3 nuts, 120 pcs m4 nuts, 70 pcs m5 nuts, 70 pcs m5 washers, 120 pcs m4 washers, 160 pcs m3 washers, 160 pcs m2 washers.