Vlier SPFP52 Press Fit Spring Plunger Stainless Steel

Product Description

The VLIER SPFP52 is a press fit spring plunger designed for light end force applications in precision assembly, fixturing, and indexing operations. The plunger body measures 0.188 inches in diameter and 0.441 inches in length, with a flanged design that seats flush into a bored hole without threading. The stainless steel body and nose deliver corrosion resistance suitable for wash-down environments or applications where carbon steel is not appropriate. Initial end force is 1.5 pounds, advancing to a final end force of 4.5 pounds, making this plunger well suited for light detent and positioning tasks where controlled resistance is required.

This spring plunger is used in light-duty positioning, detent, and locating applications across manufacturing, assembly jigs, and tooling fixtures. The press fit installation method eliminates the need for threaded bores, allowing fast installation into drilled holes in metal, plastic, or composite workpieces. The flanged design limits insertion depth and provides a positive stop against the workpiece surface. This part is typically installed by machinists, tool and die makers, or maintenance technicians in industrial and manufacturing environments.

Key Features

• Press fit installation into drilled holes - no threading required
• Stainless steel body and nose for corrosion resistance
• 1.5 pound initial to 4.5 pound final end force for light detent applications
• Flanged design provides a positive stop at 0.044 inches flange thickness and 0.25 inches flange diameter
• Plunger diameter of 0.121 inches with a projection of 0.094 inches
• No locking element - standard spring-loaded plunger configuration

Compatibility

Designed as an OEM-style replacement or direct-fit component for press fit spring plunger applications requiring a 0.188 inch body diameter and flanged retention in light end force assemblies.

Installation Notes

Installation requires a precision drilled bore sized to accept the 0.188 inch press fit body. Press the plunger into the bore using an arbor press or similar controlled force tool - do not strike with a hammer, as this may damage the plunger mechanism or distort the bore. Ensure the workpiece material and bore depth are appropriate for the 0.441 inch body length and 0.441 inch length under flange before installation. Once seated, the flange face should rest flush against the workpiece surface.