A Lateral Spring Plunger is a mechanical element with a built-in spring and plunger that is primarily used to apply continuous lateral pressure to a workpiece or part to locate, secure or limit it. It differs from the common straight (axial) spring-loaded plunger in that the force is applied from the lateral direction.

Structural features

Housing: generally metal or wear-resistant material for fixed installation.

Spring: Located internally and provides constant pressure.

Plunger/Ball: Pushed by the spring, it extends laterally and compresses the workpiece.

Main Functions

Lateral Positioning: Maintains the exact position of the part horizontally or laterally.

Prevents slipping or loosening: creates friction or compression on the surface of the part.

Adjustment or locking: used as a repetitively adjustable positioning element in equipment.

Application Scenarios

Lateral compression of workpieces in machine tool jigs and fixtures.

In conveyors or automated equipment to keep parts in alignment.

As positioning, cushioning or compression components in precision machinery or moulds.


The Lateral Spring Plunger is a spring loaded plunger that acts in a ‘lateral’ direction. Its core function is to provide constant lateral pressure through the internal spring to achieve positioning, compression, and non-slip functions, and it is widely used in automation equipment, fixtures, and mechanical structures.

Explore how lateral spring plungers, spring locating pins, and side thrust pin improve positioning accuracy and holding force in mechanical assemblies.