The knurled nut are also referred to as thumb and set screws. They are a special type of screw that can be operated by hand. Due to its ribbed edge, slipping of the fingers is prevented when screwing in and out. No additional tools are required for attaching/loosening the thumb screw. Areas of application: the thumb screws can be used individually. They are particularly convincing in connections that need to be loosened frequently. Areas of application include the following areas: household appliances, furniture construction, mechanical engineering, industrial and underwater technology, precision engineering and testing equipment. Material: aluminium. You will receive only first-class products.