Vlier SSPHB56P Threaded Ball Plunger 5/16-18 Stainless Steel

Product Description

The VLIER SSPHB56P is a threaded ball plunger designed for controlled end-force applications in precision mechanical assemblies. The body and ball are both constructed from stainless steel with a passivated finish, providing corrosion resistance in demanding environments. This plunger features a 5/16-18 thread, a ball diameter of 0.156 inches, and a body length of 0.72 inches. Initial end force is 4 pounds, with a final end force of 9 pounds, making it suitable for indexing, positioning, and light detent functions. A locking element is included to secure the plunger in place after installation. Machinists, toolmakers, and mechanical assembly technicians are the typical installers.

This ball plunger is intended for use in fixtures, jigs, tooling plates, and precision mechanical components where repeatable positioning or controlled resistance is required. The stainless steel construction makes it appropriate for clean-room, food-processing-adjacent, or corrosion-sensitive environments. Maximum ball reach is 0.04 inches, which suits applications requiring minimal protrusion and precise detent engagement. The 5/16-18 thread allows direct installation into tapped holes in metal assemblies without additional hardware.

Key Features

• 5/16-18 threaded body for direct installation into standard tapped holes
• Stainless steel body and ball with passivated finish for corrosion resistance
• 4 pound initial end force and 9 pound final end force for controlled detent action
• Maximum ball reach of 0.04 inches for minimal protrusion applications
• Integrated locking element secures plunger position after adjustment
• Designed for controlled end-force indexing and positioning applications

Compatibility

Designed as an OEM-style replacement or direct-fit component for precision mechanical assemblies requiring a 5/16-18 threaded ball plunger with controlled end-force characteristics.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using a standard hex wrench or spanner tool appropriate for the plunger body. Ensure the receiving tapped hole is clean and free of debris before threading in the plunger. Engage the locking element only after the plunger is set to the desired position. Do not overtighten, as this may damage the locking element or distort the threaded engagement.