Gibraltar 34237SS Locking Plunger Threaded Stud 5/16-18

Product Description

The GIBRALTAR 34237SS is a locking-style spring plunger with a knobless threaded stud design, intended for use in indexing, positioning, and workholding applications across industrial and mechanical assemblies. The plunger operates on a captive spring mechanism that delivers an initial end force of 1.5 pounds and a final end force of 6 pounds, providing reliable holding force across its travel range. The stud thread size is 1/4-20 with a 5/16-18 body thread and a thread length of 0.625 inches. The maximum plunger diameter is 0.179 inches. This part is installed by machinists, toolmakers, and maintenance technicians working with fixtures, jigs, and mechanical assemblies requiring repeatable positioning.

The 34237SS is suited for use in production fixtures, machine tool setups, and general industrial equipment where a flush or low-profile locking plunger is needed. The knobless threaded stud configuration allows the unit to be installed in tight clearance locations where a protruding knob would interfere with adjacent components or tooling. The locking element keeps the plunger in the retracted position when needed, preventing unintended engagement during assembly or changeover operations.

Key Features

• Locking plunger type with integrated locking element to hold plunger in retracted position
• Knobless threaded stud design for flush installation in clearance-critical assemblies
• Initial end force of 1.5 pounds, final end force of 6 pounds for firm, controlled positioning
• 5/16-18 body thread with 0.625 inch thread length for secure installation depth
• Plunger projection of 0.1875 inches and plunger length of 1.438 inches
• Head height of 0.344 inches with length under head/shoulder of 0.8125 inches

Compatibility

Designed as an OEM-style replacement or direct-install spring plunger for industrial fixtures, jigs, and mechanical assemblies requiring a 5/16-18 threaded locking plunger with a knobless stud configuration.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard hand tools appropriate for threaded fastener installation. Ensure the mating threaded bore is clean and free of debris before installing the plunger. Do not overtighten, as this can deform the plunger housing or damage the locking element. Verify plunger projection and end force requirements are compatible with the application before assembly.