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Slotted Capstan Screw

Slotted Capstan Screws host a cylindrical head that features a number of radially symmetrical holes, which can be used for the insertion of a lever, cable or wire, which is then regularly turned around or wound around the screw to adjust the tension.

They are relatively unique in that they can be driven using their slotted drive with a bit, or via their radial holes.

Applications that these screws can be found in include in metrology, the science of measurement, or most often within musical instruments such as pianos, due to their fine incremental adjustment capabilities.

Available in A1 Stainless Steel (black triangle icon image), Nylon/plastic (blue icon image) and Brass, with other materials also available, with a range of finishes or coatings available. Optional thread locking patches are also available on request.

As standard, Slotted Capstan Screws are available in M3 to M6.

Please contact us with your requirements to further your enquiry.

slotted capstan screws

Slotted Capstan Screw
Thread Diameter M3 M4 M5 M6
Head Diameter (D) 5.5 7.0   8.5  10.0
Head Hole Diameter (H) 1.5  2.0  2.5 3.0
Head Length (K) 4.0  5.0  6.5 8.0
Slot Depth (P) (min) 1.0  1.4  1.7 2.2
Slot Width (N) 0.8 1.0   1.2 1.6
Available Sizes (mm) M3 M4 M5 M6
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