Vlier SPRTL250 Locking Knob Handle Plunger 1/4-20

Product Description

The VLIER SPRTL250 is a locking knob handle plunger with a 1/4-20 thread and a Delrin knob, designed for precise positioning and locking applications in mechanical assemblies. The plunger delivers an initial end force of 0.12 pounds and a final end force of 0.36 pounds, providing controlled spring tension suitable for light-duty indexing and positioning tasks. With a maximum plunger diameter of 0.16 inches and a plunger projection of 0.13 inches, this unit is built for compact installations where accurate, repeatable positioning is required. Machinists, equipment assemblers, and mechanical maintenance technicians are the typical installers of this component.

The SPRTL250 is suited for use in industrial machinery, jigs, fixtures, and precision equipment panels where a hand-operable locking plunger is needed. Its Delrin knob allows for tool-free manual adjustment, making it appropriate for applications that require frequent repositioning or panel-mounted locking functions. This plunger fits into assemblies using standard 1/4-20 threaded bores and is commonly found in both OEM manufacturing and aftermarket maintenance scenarios across a wide range of light industrial equipment.

Key Features

• Locking plunger type with Delrin knob for tool-free hand operation
• 1/4-20 thread for compatibility with standard threaded bores
• Initial end force of 0.12 pounds, final end force of 0.36 pounds for light-duty spring tension
• Maximum plunger diameter of 0.16 inches and plunger projection of 0.13 inches for compact fitment
• Body length of 0.63 inches with a head diameter of 0.50 inches for low-profile installation

Compatibility

Designed as an OEM-style replacement or direct-fit component for mechanical assemblies using standard 1/4-20 threaded locking plunger positions in industrial fixtures, jigs, and equipment panels.

Installation Notes

Installation is typically performed by machinists or mechanical maintenance technicians using standard hand tools. Ensure the receiving bore is clean and correctly tapped to 1/4-20 specifications before threading in the plunger body. De-energize or lock out any machinery before servicing plunger assemblies on active equipment. Do not exceed the rated end force range when selecting this component for spring-loaded applications.