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

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 Knob - Compatible Screw Sizes - M3 ; Base Diameter - 6.0 mm | 0.236 in ; Overall Height - 19.5 mm | 0.768 in ; Knob Diameter - 12.0 mm | 0.472 in Thumb screws are best used in applications where the fastener doesn't need to be torqued excessively tightly. 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.

Knurled Knobs, or Thumb Knobs easily press fit on to screws, creating a small knob for clamping or securing an application. These Thumb Screw Knobs, also known as Thumb Bolts, can be used with any length of screw. The knurled edge is easily gripped for tightening and loosening. Knurled Knob - Compatible Screw Sizes - M4 ; Base Diameter - 8.0 mm | 0.315 in ; Overall Height - 17.5 mm | 0.689 in ; Knob Diameter - 16.0 mm | 0.63 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 thumb screws are commonly chosen because they give the user a better grip on the head of the fastener when installing by hand.Thumb Screw Knob - Compatible Screw Sizes - M4 ; Base Diameter - 7.0 mm | 0.276 in ; Overall Height - 11.5 mm | 0.453 in ; Knob Diameter - 17.0 mm | 0.669 in 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. If a panel or component needs to be fastened down reasonably tightly, but access for a screwdriver or wrench is limited, manufacturers will often choose to include a thumb screw instead. for a screwdriver or ratchet. The 'knurled' feature of the head makes this type of screw ideal for use Thumb Screw Knob - Compatible Screw Sizes - M4 ; Base Diameter - 7.0 mm | 0.276 in ; Overall Height - 4.5 mm | 0.177 in ; Knob Diameter - 13.0 mm | 0.512 in 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