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Cheap thumb screws, thumb bolts and thumb knobs are widely available online, often sold both individually and in bulk. There are varying threaded nuts, from low profile flat knurled nuts to the deeper grip nuts for added grip surface area. 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. Westfield Fasteners Limited is a company registered in England and Wales with company number 07215583. Also available are Knurled Screws or Nuts made from either Steel, with a tensile strength class of 5.
Thumb screws (sometimes written as thumbscrews) are multipurpose fasteners designed to be tightened and loosened by hand, rather than needing tools like screwdrivers or wrenches for installation. The pattern of bumps, ridges or notches allows for much-improved friction between fingers and the otherwise smooth edges of the thumb screw. They offer excellent rigidity and positional accuracy, with stainless steel also being an option in cases where the material must continue to look immaculate over extended periods. 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. Generally used in timber to timber and timber to metal construction, these bolts incorporate a square neck to grip the hole in the timber when fitting, and therefore negates the need for any drive recess to be included on top of the head.
Knurled Knobs, or Thumb Knobs easily press fit on to screws, creating a small knob for clamping or securing an application.
A thumb knob may also be listed as a star knob, depending on the precise shape of the head designed for gripping by hand. Several options available; the first two options offer easy assembly with bolts and nuts, with a single hammer-stroke. Thumb screws are available in a shouldered versions known as knurled thumbscrews and full threaded versions. Knurled thumb screws are commonly chosen because they give the user a better grip on the head of the fastener when installing by hand. In addition to the standard steel range of Knurled Thumb Screws and Wing Thumb Screws many are also available in stainless steel grades 303 and 316.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. Zinc Flake coated high tensile steel class 10 - a higher tensile non-stainless grade for screws and bolts.
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