Gibraltar 34247 Locking Plunger 1/2-13 Thread Steel

Product Description

The GIBRALTAR 34247 is a locking knob handle plunger with a knobless threaded stud design, built for precision indexing and positioning applications in industrial and mechanical assemblies. It features a 1/2-13 inch thread size with a 7/8 inch thread length and a stud thread size of 3/8-16. The plunger delivers an initial end force of 0.75 pounds and a final end force of 4 pounds, providing reliable spring-loaded retention. Constructed from steel with a zinc-plated finish, it offers corrosion resistance suited for shop floor and light industrial environments. Licensed tradespeople and machine builders install this type of component in fixtures, jigs, and positioning assemblies.

The GIBRALTAR 34247 is suited for use in mechanical fixtures, tooling setups, and industrial positioning equipment where repeatable spring-loaded plunger engagement is required. The knobless threaded stud configuration allows it to be driven or adjusted with a wrench or tool rather than by hand, making it appropriate for applications where a flush or recessed profile is preferred. It is sold individually and is a direct-fit fastener-style component for standard threaded bores.

Key Features

• Locking plunger design with built-in locking element for positive retention
• 1/2-13 thread size with 7/8 inch thread length for standard threaded bore fitment
• Spring end force range of 0.75 pounds initial to 4 pounds final
• Knobless threaded stud style allows tool-driven installation and adjustment
• Steel construction with zinc-plated finish for corrosion resistance
• Maximum plunger diameter of 0.31 inches with a tolerance of plus 0.001 inches

Compatibility

Designed for use in standard 1/2-13 threaded bores in industrial fixtures, jigs, tooling plates, and mechanical positioning assemblies requiring a spring-loaded locking plunger.

Installation Notes

Installation is performed by threading the stud into a pre-tapped 1/2-13 bore using a wrench on the stud flats. Ensure the mating bore is clean and free of debris before installation. Verify plunger projection clearance before final torque to avoid binding. Follow the equipment manufacturer's assembly procedures and applicable ASME or facility maintenance standards when integrating into production fixtures.