Grub screws, also known as rubber-end machine screws, plastic head screws, and soft stop screws. They are commonly used in furniture assembly and repair to secure joints and prevent damage to the furniture. They also can be used in electronics and electrical equipment to secure components and provide insulation and anti-slip functions. In industrial machinery and equipment, they are used to secure parts and provide shock absorption and anti-slip functions.SpecificationMaterial: 304 Stainless Steel, NylonColor: Silver ToneThread Size: M4x0.7Thread Length: 7mm / 0.28 inchTotal Length: 8mm / 0.31 inchInternal Hex Width: 2mm / 0.08 inchPacking List: 5 x ScrewAdvantage1. Made from 304 stainless steel, these screws are resistant to corrosion, ensuring long-lasting performance.2.