Vlier SSFRN500 Spring Plunger 1/2-13 Stainless Steel

Product Description

The VLIER SSFRN500 is a non-locking, L-handle spring plunger with a 1/2-13 thread size and a stainless steel body and handle. It delivers an initial end force of 1 pound and a final end force of 5 pounds, making it well suited for indexing, positioning, and light-duty holding applications in industrial assemblies. The plunger diameter measures 0.31 inches with a plunger projection of 0.75 inches. The overall body length is 2.11 inches, and thread length is 1.1 inches. Maintenance technicians, machine builders, and tooling specialists install this component in fixtures, jigs, and mechanical assemblies where repeatable positioning force is required.

This spring plunger is used in light industrial and manufacturing environments where a non-locking, threaded plunger is needed to locate, retain, or index moving components. Typical applications include fixture plates, assembly jigs, and tooling setups in both production and maintenance settings. The stainless steel construction makes it appropriate for environments with moderate corrosion exposure. The L-handle design allows manual adjustment and removal without additional tooling in accessible mounting locations.

Key Features

• Non-locking plunger design allows free travel without a locking element
• 1/2-13 thread size with 1.1 inches of thread length for secure installation in standard tapped holes
• Initial end force of 1 pound rising to a final end force of 5 pounds for consistent positioning pressure
• Stainless steel handle and body construction for corrosion resistance
• L-handle configuration enables tool-free manual adjustment in accessible locations
• Plunger projection of 0.75 inches provides adequate engagement depth for most fixture applications

Compatibility

Designed as a direct-fit threaded spring plunger for any standard 1/2-13 tapped hole in fixture plates, jigs, tooling blocks, and light industrial assemblies requiring non-locking plunger retention.

Installation Notes

Installation is performed by threading the plunger body into a prepared 1/2-13 tapped hole by hand or with a wrench applied to the 0.5 inch hex. Ensure the mating hole depth accommodates the full thread engagement and plunger projection before installation. Depressurize or de-energize any assembly before installing or removing spring plungers in live fixtures. Do not overtighten, as this can restrict plunger travel or damage the spring mechanism.