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Thumb screw thread gauge and diameter are typically stated in metric units in the UK. Elsewhere, measurements given in inch sizes may be more widespread. 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.
Exactly what is a thumb screw? It’s a type of fastener with a large, easy-to-grip head that you can tighten and untighten by hand. It’s typically used in two scenarios: cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.
Exactly what is a thumb screw? It’s a type of fastener with a large, easy-to-grip head that you can tighten and untighten by hand. It’s typically used in two scenarios:
Brass screws and bolts are a popular choice for a range of applications and assemblies due their diverse set of characteristics. This is dependent on the specific type or grade of Brass. A non-permanent fastener is needed for convenient access, reducing maintenance and inspection times
As standard, these Brass Flat Knurled Thumb Screws to DIN 653 are available in thread sizes from M3 to M8 and lengths ranging from 6mm to 40mm. Knurled Reduced Thread Captive Thumb Screws are also available for applications where safety is a concern. Examples of typical applications include instrument panels, case lids, battery compartments and enclosure windows. A thumb knob may also be listed as a star knob, depending on the precise shape of the head designed for gripping by hand. In the same way, wing nuts and screws and knurled nuts and thumb screws also provide a far greater grip (and hence torque) than a plain nut, and are designed to be tightened by hand, although the metal variations can be tightened or loosened using tools if necessary. This extra grip also makes them easily removable when needed. Thrust pads can be used in combination with screws to prevent marking, scratches or dents to materials that are easily damaged.Knurled bolts and screws of this type are so-called because of the knurling pattern - a series of machined ridges or bumps - found around the screw head. Knurling is a widespread manufacturing technique for improving grip or torque force on a huge array of hand-installed components and fasteners. It is a soft, machinable material prone to bending and breaking under high torque loads. To prevent stripping or damage, they require a pre-drilled or tapped hole before installation, ideally with a steel screw. couplings, screws, hex nuts, ball bearings, roller bearings, thrust bearings, ceramic and hybrid bearings, stainless steel bearings, miniature bearings, shafting, corrosion resistant bearings - see the full listing in the 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. The pattern of bumps, ridges or notches allows for much-improved friction between fingers and the otherwise smooth edges of the thumb screw. Thumb Screw Knobs
We also supply custom manufactured Brass fasteners in non-standard sizes, grades and finishes to meet your requirements – including bespoke fasteners made to specification and drawings. Female thumb screws are female threaded and sometimes referred to as knobs. You can learn more in A guide to knobs: types, materials and applications. Materials Thumb screws are not intended for structural applications for obvious reasons – you need permanent fasteners for that. Typically, thumb screws should be avoided for applications that will vibrate, as they’re vulnerable to loosening. Some thumb screws do come with a Phillips slotted head – you can learn more about these heads in What are screw heads, drives and threads?Generally, it’s the slotted head thumb screws, coupled with washers, that can be used for some high-vibration applications. Common thumb screws for wood. With good corrosion resistance, these are used in light applications to fasten metal or metal to wood.Thumb screws are best used in applications where the fastener doesn't need to be torqued excessively tightly. 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. 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. This is often due to space restrictions. Knurled thumb screws are commonly chosen because they give the user a better grip on the head of the fastener when installing by hand.
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