Set screws (also known as grub screws) are headless fasteners with threads along the entire length. They are used to fix the relative position between two parts, preventing rotational or axial movement between a shaft and a mating component. During installation, the set screw is threaded into a hole and its tip presses directly against the surface of the second part (such as a shaft) or seats into a pre‑drilled dimple. Different tip styles include flat, cup, cone, dog, and cone with pilot, to suit various holding requirements. Set screws are commonly used in applications with low torque transmission or where precise positioning is required.
Customizable options:

Materials: Carbon steel (e.g., C1008/C1022), alloy steel (e.g., SCM435/10B21/40Cr), stainless steel (SS304/SS316/SS420), brass, etc.

Surface finishes: Electroplated zinc (blue/white, yellow, black), nickel plating, chrome plating, black oxide, phosphating, Dacromet, eco‑friendly coatings, etc.

Tip styles: Flat, cup, cone (90°/120°), dog (small cylindrical end), cone with pilot, serrated, etc.

Other variables: Nominal diameter (M2–M12), length (2mm–50mm), thread class, tip hardness, and drive type (hex socket, Torx®, slotted) can be manufactured to customer drawings.
Widely used in machinery assembly, gear fixing, pulley locking, bearing positioning, mold components, and furniture hardware.