huruirui Nuts and Bolts Washers Assorted Set,M3 M4 M5 M6 Black Hex Socket Head Cap Screws Kit 500pcs, Thread Machine Bolt Set Fastener Repair Tools Assortment with 4 Wrench

[Bolts and Nuts]:M3x10mm/20mm/25mm/30mm, 10 for each model, 40 nuts, 45 washers, M4x10mm/20mm/25mm/30mm, 10 for each model, 40 nuts, 45 washers, M5x10mm/20mm/25mm/30mm, 10 for each model, 40 nuts, 45 washers, M6x10mm/20mm/25mm/30mm,10 for each model, 40 nuts, 45 washers.bolt wrenches 4pcs.Total number: 500. Products of different sizes and specifications meet people's matching needs. 【Nuts and Bolts Set】: 500 pieces of M3 M4 M5 M6 screws bolts of different sizes and specifications with matching nuts and washers to meet the needs of different people. Nuts and washers increase contact area and reduce pressure to protect bolts and parts. 【Bolts Material】: M3 M4 M5 M6 Black Hex Socket Head Cap Screws Bolts and Nuts Kit is made of 10.9 grade carbon steel, much harder than stainless steel. Black surface treatment, not easy to rust, moisture-proof, anti-oxidation, anti-corrosion, acid and alkali resistance, high hardness. 【Easy to Use】Nuts and washers can expand the contact area, reduce the pressure, and protect the screws and parts. The black carbon steel socket head cap screws thread is uniform, smooth and strong, not easy to deform and slide during the working process, and it matches the nut perfectly. In addition, each set of screws is equipped with a reusable storage box, and the remaining bolts and nut washers can be used for Temporarily stored in the box, convenient for next use. 【HEXAGON SCREW PACKAGING】All nuts and bolts washers are packaged in a durable and sturdy plastic box to prevent screws from being scattered or lost during use. The bolts come with a 4-piece wrench, also known as an Allen key, which perfectly matches our M3 M4 M5 M6 bolts.