920pcs Hex Socket Flat Bolt Set 304 Stainless Steel Screws Nuts Washers Assortment With Wrench Feature:1. Various sizes: The ruby and nut set has different sizes, nuts, washers and wrenches, which can meet your different daily needs2. Precision design: deep and transparent thread, pointed screw teeth, glazed surface without burrs, uniform force, not easy to slip when rotating, the head fits the workpiece without protrusions, visually more beautiful3. 304 stainless steel: made of high-quality 304 stainless steel, which has good rust resistance, corrosion resistance, strength and deformation resistance, and is durable4. Wide applications: Flat head screws are very suitable for use as fasteners in small spaces, industrial and architectural equipment5. Application: widely used in industrial machinery, such as household appliances and office equipment, communication equipment, ship assembly, etc. Specification:Item Type: Hex Socket Flat ScrewMaterial: 304 Stainless SteelFabrication Standard: DIN7991Screw Model: M3x8mm, M3x12mm, M3x16mm, M3x20mmM4x8mm, M4x12mm, M4x16mm, M4x20mmM5x8mm, M5x12mm, M5x16mm, M5x20mmM6x8mm, M6x12mm, M6x16mm, M6x20mmCountersunk Hex Bolt TypeM3M4M5M6Thread Diameter (Approx.)3mm/0.12in4mm / 0.16in5mm / 0.20in6mm / 0.24inPitch (Approx.) 0.5mm / 0.02in0.7mm / 0.03in0.8mm / 0.031in1mm / 0.04inHead Diameter (Approx.) 5. 7mm / 0.22in7.8mm / 0.31in10mm / 0.40in11.57mm / 0.46inHead Height (Approx.) 2.5mm / 0.10in3.5mm / 0.14in4.1mm / 0.16in4.9mm / 0.19in Wrench Size (Approx.) 1.7mm / 0.07in2.3mm / .09in2.8mm / 0.11in3.3mm / 0.13inHex Full Nut ModelThread Diameter (Approx.) Pitch (Approx.) Nut Height (Approx.) Wrench Diameter (Approx.) M33mm / 0.12in0.5mm / 0.02in2.4mm / 0.09in5.5mm / 0.22inM44mm / 0.16in0.7mm / 0.03in3.2mm / 0.12in7mm / 0.27inM55mm / 0.20in0.8mm /0.031in4mm/0.16in8mm/0.31inM66mm/0..24in1mm/0.04in5mm/0.20in10mm/0.40inWasher ModelThickness(Approx)Inner Diameter(Approx)Outer Diameter(Approx)M30.5mm/0.02in3.2mm/0.12in7mm/0.27inM40.8mm/0.031in4.3mm/0.17in9mm/0.35inM51mm/0.04in5.3mm/0.21in10mm/0.40inM61.6mm/0.06in6.4mm/0.25in12mm/0.47inPackage List:1 x Tweezers4 x Hex Wrench25 x M3x8mm Screw25 x M3x12mm Screw25 x M3x16mm Screw25 x M3x20mm Screw20 x M4x8mm screw20 x M4x12mm screw20 x M4x16mm screw20 x M4x20mm screw15 x M5x8mm screw15 x M5x12mm screw15 x M5x16mm screw15 x M5x20mm screw10 x M6x8mm screw10 x M6x12mm screw10 x M6x16mm screw10 x M6x20mm screw120 x M3 nut90 x M4 nut65 x M5 nut45 x M6 nut120 x M3 washer90 x M4 washer65 x M5 washer45 x M6 washer