Vlier SSLF250P Locking Knob Handle Plunger 1/4-20

Product Description

The VLIER SSLF250P is a stainless steel locking knob handle plunger designed for precision indexing, positioning, and retention applications in industrial and mechanical assemblies. It features a 1/4-20 threaded body with a 0.4-inch thread length and a knurled knob head that locks the plunger in the retracted position for hands-free operation. Initial end force is 0.5 pounds, with a final end force of 2 pounds, making it suitable for light-duty but reliable holding tasks. Fabricated from stainless steel throughout, it is well suited for environments where corrosion resistance is required. Mechanical assemblers and maintenance technicians are the typical installers for this hardware component.

The SSLF250P is used in machine tool fixtures, jigs, panel assemblies, and equipment enclosures where repeatable plunger positioning is needed. The locking plunger type allows the plunger to be retracted and held out of engagement without spring pressure, then released to re-engage on demand. The knurled knob provides positive manual grip for actuation. This part is commonly specified in light industrial equipment, instrumentation panels, and fabricated assemblies requiring a compact, corrosion-resistant spring plunger with locking capability.

Key Features

• Locking plunger retains retracted position for hands-free clearance during loading or positioning
• Knurled knob head provides positive manual grip for easy actuation
• 1/4-20 thread size with 0.4-inch thread length for straightforward installation into tapped holes
• Stainless steel construction for corrosion resistance in demanding environments
• Initial end force of 0.5 pounds and final end force of 2 pounds for light-duty retention
• Compact plunger projection of 0.125 inches suits tight-clearance assemblies

Compatibility

Designed as a direct-fit locking knob handle plunger for applications requiring a 1/4-20 threaded spring plunger with a stainless steel body and locking element.

Installation Notes

Installation is performed by threading the SSLF250P into a pre-tapped 1/4-20 hole to the required depth using the knurled knob or an appropriate tool on the head. Ensure the mating assembly is depressurized or de-energized before servicing any plunger or indexing hardware. Do not overtighten, as stainless steel threads are susceptible to galling; applying an appropriate anti-galling lubricant to the threads is standard practice. Verify plunger projection and engagement depth against the assembly drawing prior to final installation.