Thumb screws are available in a shouldered versions known as knurled thumbscrews and full threaded versions. Knurling is a widespread manufacturing technique for improving grip or torque force on a huge array of hand-installed components and fasteners. The metric sizing (M5, M6, M12 etc) is a reference to the diameter of the shaft in mm, while thread measurements are taken from ridge to ridge on the threaded shaft section itself. A true thumb screw or bolt can be distinguished from standard bolts or rivets by its large head, offering easier grip. use in applications such as access panels, number plates and many anti-vandalism securing solutions.

Resin is often used for the head mouldings on thumb knobs, whether they are the traditional star head type or a flattened turnkey style thumb screw with moulded wings on the shoulder for easier gripping between thumb and forefinger. Examples of typical applications include instrument panels, case lids, battery compartments and enclosure windows.Common sizes that fit the threaded holes in a wide variety of everyday UK devices, panels and covers include M6 thumb screws, M4 knurled thumb screws, M8 thumb screws, and M12 thumb screws. Also available are Knurled Screws or Nuts made from either Steel, with a tensile strength class of 5. One of the main reasons why thumb screws are often chosen over traditional screws is that certain parts and assemblies do not leave much room for using hand tools.

To choose the best thumb screw for the task, it is important to bear in mind certain characteristics such as length, diameter, and thread size. The head section on a thumb screw knob will often be made of plastic (nylon) or resin (Yuliya resin thumb screws are common) and manufactured as a separate piece to the metal threaded section of the screw-in shaft itself. Knurled Knobs, or Thumb Knobs easily press fit on to screws, creating a small knob for clamping or securing an application. This tends to imply that the product would need to be more rigid (less range of deflection) and have greater tensile strength than most of these relatively small fasteners tend to offer. Small thumb screws can be as short as 4mm or less from the shoulder to the end of the threading, while long thumb screws commonly extend to around 25-30mm (1 inch) and beyond.Knurled head thumb screws are one of the most common applications of this technique, which can be found on many types of stainless steel or nylon nuts, screws and bolts. Their main use is for fastening down panels, wiring, lids, safety covers, battery compartments, and any other part or component that might need to be removed and reinstalled frequently. Zinc Flake coated high tensile steel class 10 - a higher tensile non-stainless grade for screws and bolts. Knurled thumb screws are commonly chosen because they give the user a better grip on the head of the fastener when installing by hand.

that due to the nature of the surface finish on Unbrako products, some surface corrosion may be evident. This is often the case for things like battery covers, enclosure doors and electrical safety panels. They have a wide range of useful applications, especially in parts, materials and builds that do not easily support the use of manual or power tools. Zinc Flake coated high tensile steel class 12 - a higher tensile non-stainless grade for screws and bolts.There are varying threaded nuts, from low profile flat knurled nuts to the deeper grip nuts for added grip surface area. Thumb ScrewsThumb screws from Boneham and Turner Ltd come in blacked steel, stainless steel and brass. While most are used in some form of plastic or metal assembly, it is not unusual to see thumb screws for wood assemblies where the specific type of construction, installation, or action they perform makes them a suitable choice. Most thumb screws come in either long or very short lengths, depending on the application where they are needed.