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where conditions can be challenging such as food preparation or clean room operations. Manufactured 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.
Thumb screws can be used in a wide range of tasks and assemblies. 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. Cheap thumb screws, thumb bolts and thumb knobs are widely available online, often sold both individually and in bulk. 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. for a screwdriver or ratchet. The 'knurled' feature of the head makes this type of screw ideal for use Thumb Screws or Knurled Knob Screws are designed to be tightened and loosened by hand, without the need Knurled Knob - Compatible Screw Sizes - M5 ; Base Diameter - 10.0 mm | 0.394 in ; Overall Height - 21.5 mm | 0.846 in ; Knob Diameter - 20.0 mm | 0.787 in
Thumb Screw Knob - Compatible Screw Sizes - M6 ; Base Diameter - 10.0 mm | 0.394 in ; Overall Height - 7.5 mm | 0.295 in ; Knob Diameter - 25.0 mm | 0.984 in
Knurled Knob - Compatible Screw Sizes - M4 ; Base Diameter - 8.0 mm | 0.315 in ; Overall Height - 29.5 mm | 1.161 in ; Knob Diameter - 16.0 mm | 0.63 in A second common scenario where thumb screws are often the best choice is where regular and repeated loosening or tightening of the fastener will be necessary. This is often the case for things like battery covers, enclosure doors and electrical safety panels. Thumb screws are best used in applications where the fastener doesn't need to be torqued excessively tightly. Westfield Fasteners Limited is a company registered in England and Wales with company number 07215583.
Thumb Screw Knob - Compatible Screw Sizes - M8 ; Base Diameter - 13.0 mm | 0.512 in ; Overall Height - 9.5 mm | 0.374 in ; Knob Diameter - 36.0 mm | 1.417 in 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. It is unusual to find very long thumb screws for most day-to-day fastening jobs. 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. Knurled Knob - Compatible Screw Sizes - M3 ; Base Diameter - 6.0 mm | 0.236 in ; Overall Height - 13.5 mm | 0.531 in ; Knob Diameter - 12.0 mm | 0.472 in Thumb Screw Knob - Compatible Screw Sizes - M4 ; Base Diameter - 7.0 mm | 0.276 in ; Overall Height - 5.5 mm | 0.217 in ; Knob Diameter - 13.0 mm | 0.512 in
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