Gibraltar 34250SS Spring Plunger 1/4-20 Stainless Steel

Product Description

The GIBRALTAR 34250SS is a non-locking spring plunger with a knobless threaded stud design, intended for indexing, positioning, and light retention applications in mechanical assemblies. It features a 1/4-20 external thread with a 0.5 inch thread length and a stainless steel body measuring 0.625 inches in length. The plunger diameter reaches a maximum of 0.144 inches with a tolerance of plus 0.001 inches, and the unit delivers an initial end force of 1 pound ramping to a final end force of 5 pounds. A zinc-plated finish is applied over the stainless steel construction. This part is installed by machinists, maintenance technicians, and mechanical assemblers working with fixtures, jigs, and precision tooling.

The 34250SS suits applications where a threaded, adjustable spring plunger is needed without an external knob or handle. The knobless threaded stud configuration allows the plunger to be driven flush or set below a surface using a tool, making it appropriate for tight-clearance fixtures, machine guarding, and assembly tooling. The 0.125 inch plunger projection and 0.125 inch length under head or shoulder allow precise depth control when installed into tapped holes in metal or plastic workpieces.

Key Features

• Non-locking plunger type allows free spring-loaded travel without a locking mechanism
• Knobless threaded stud style accepts a tool for installation and adjustment in tight spaces
• Stainless steel construction with zinc-plated finish for corrosion resistance in industrial environments
• Initial end force of 1 pound and final end force of 5 pounds for light-to-moderate retention loads
• 1/4-20 external thread with 0.5 inch thread length fits standard tapped holes
• Plunger projection of 0.125 inches and plunger length of 1.062 inches for consistent depth engagement

Compatibility

Designed as a direct-fit replacement or new-installation spring plunger for any assembly requiring a 1/4-20 threaded hole and a non-locking, knobless stud-style plunger in stainless steel.

Installation Notes

Installation requires a tapped 1/4-20 hole in the receiving workpiece. The knobless stud design requires a screwdriver or hex tool applied to the stud thread for driving and torquing. Ensure the mating bore is clean and free of debris before threading in the plunger body. Do not overtighten, as the stainless steel body can gall if excessive torque is applied without thread lubricant.