![TPI Series Adjustment Screw TPI Series Adjustment Screw](https://cdn11.bigcommerce.com/s-p4r27vn1d8/images/stencil/640x960/products/275/3409/ee4f2499-7a81-44e0-9936-f095362f6336_TPI%2520ADJ%2520SCREW__18818.1699676215.jpg?c=1)
![TPI Series Adjustment Screw TPI Series Adjustment Screw](https://cdn11.bigcommerce.com/s-p4r27vn1d8/images/stencil/160w/products/275/3409/ee4f2499-7a81-44e0-9936-f095362f6336_TPI%2520ADJ%2520SCREW__18818.1699676215.jpg?c=1)
Siskiyou's 1/4-inch collet hex drive or SoftTouch® TPI series adjustment screws are ideal for OEM and custom applications and are miniature versions of our 3/8-inch collet adjustment screws. They feature single-wrench-size adjustment and locking screw hex drives. The brass collet includes a built-in travel-lock mechanism to reliably hold device positioning.
TPI series fine and ultrafine adjustment screws are producing industry-leading resolutions and a cost-effective alternative to standard micrometers, where position readout is not a requirement. Adjustment screw contact tips are fitted with a hardened ball bearing for exceptionally smooth adjustment.
Our TPI adjustment screws are fitted with 'black' SoftTouch® drive-knob caps by default.
*Minimum controllable motion*: BASED ON 1° OF ADJUSTMENT SCREW ROTATION
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