Luer Adapter

Luer adapter is a type of blood collection needle with an external thread at the connecting end. Its core positioning is the "detachable and stable interface" between the lancet and the needle holder: it ensures reliable connection during puncture and tube replacement, while allowing the lancet to be unscrewed from the needle holder when needed, facilitating subsequent operations (such as connecting infusion sets).

Threaded connections: reliability upgrade from "tightening" to "tightening."
Traditional direct-insert lancets rely on friction and coordination with the needle holder, but clinically, there is a risk of "poor fit leading to bleeding." The spiral needle is threaded on the inner or outer wall of the post-spike plug needle holder, forming a mechanical lock with the needle holder, achieving a stable connection without adhesive while maintaining detachability. The direct clinical benefit of this design is reduced bleeding at the junction and makes it possible to "remove one end of the lancet and connect the infusion set after the blood is drawn."

Thread specifications: "hidden parameters" in foreign trade scenarios.
The thread specifications (pitch, diameter) of the spiral needle directly determine whether it can match the needle holder in the customer's hand. If the lancet is not vertically screwed into the needle holder, it may damage the connection between the holder and the needle, and may even cause the needle tip to loosen during the puncture process. This means the precision requirements for thread fitting are not low. When quoting for foreign trade,

if the customer already has a needle holder supplier, it is necessary to first confirm whether the other party's thread specifications are compatible.