DXS M2–M12 × 0.25 Ball-Tip Fine-Thread Screws

DXS adjustment screws combine a fine-thread cylindrical body with a ball-shaped contact tip for optical or instrument mechanisms that require screw adjustment. This listing retains 60 complete model selections. Check the mating thread, tip contact arrangement, available travel and rear access together; a model suffix alone does not establish a dimensional definition.

Model and mating thread

Use the complete model to confirm nominal diameter, pitch, overall length, threaded length and mating bushing. The source describes a 0.25 mm fine pitch, but the cover and selection ranges differ. Confirm the selected model against its drawing or with the supplier instead of applying illustrative length ranges to every SKU. An example image labels M4 × 0.25 at 6–100 mm, M5 × 0.25 at 8–70 mm and M6 × 0.25 at 6–90 mm. These are illustrated series ranges, not measurements assigned to individual SKUs.

Tip contact and drive access

The source photographs show a rounded contact tip and a rear hex socket on some screws. Tip projection, ball diameter, retention method, socket size and tool clearance are not provided for every model. Assess allowable contact load, preload, side loading and support geometry in the actual mating mechanism.

Material and verified performance

The source describes stainless steel construction. Confirm material certification, hardness and surface treatment for the selected model. Thread pitch describes geometry; it does not establish mechanism resolution, backlash or positioning accuracy. Promotional precision and tolerance statements lack numerical limits and inspection methods, so they are not presented as quantified specifications here.

Selection and supply

Provide the complete model, quantity, mating bushing, assembly drawing, contact-load direction, adjustment travel, environment and acceptance requirements. Bushings, lock nuts, knobs and installation services are not included automatically. Different lengths pictured together illustrate selection and do not define a mixed pack for an individual SKU.

Selection checklist

Complete model and mating thread

Overall length, usable travel and clearance

Tip contact arrangement and load direction

Drive access, locking and preload

Material, environment and inspection requirements

To be confirmed

Model dimensions and thread tolerances

Ball diameter, projection and hardness

Hex-socket tool size

Load capacity, backlash, accuracy and service life