Gibraltar 34238 Locking Plunger 3/8-16 3/4 Inch Thread

Product Description

The GIBRALTAR 34238 is a locking knob handle plunger with a knobless threaded stud design, built for precise positioning and secure hold in industrial and mechanical applications. Configured with a 3/8-16 thread size and a 3/4 inch thread length, this plunger delivers an initial end force of 1.5 pounds and a final end force of 8 pounds. The maximum plunger diameter is 0.216 inches with a tolerance of plus 0.001 inches, and the plunger projection measures 7/32 inches (0.2188 inches). Constructed from steel with a zinc-plated finish, it is designed for durability in environments where corrosion resistance and repeatable locking action are required. Mechanical technicians and machine builders are the primary installers.

This plunger is suited for use in jigs, fixtures, machine tools, and equipment panels where a locking index point is needed. The threaded stud mount (5/16-18 stud thread size) allows for straightforward installation into tapped holes or mounting plates. With a plunger length of 1.691 inches and a length under head/shoulder of 31/32 inches (0.9688 inches), it fits common panel thickness ranges found in light industrial and OEM equipment assemblies. The knobless threaded stud style makes it appropriate for applications where a low-profile or tool-actuated interface is preferred over a hand-knob design.

Key Features

• Locking plunger with built-in locking element for positive hold at indexed positions
• 3/8-16 external thread with 3/4 inch thread length for secure panel mounting
• Knobless threaded stud (5/16-18) configuration for low-profile or recessed installation
• Initial end force of 1.5 pounds, final end force of 8 pounds for consistent indexing force
• Steel construction with zinc-plated finish for corrosion resistance
• Tight plunger diameter tolerance of plus 0.001 inches for precision fitment

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial fixtures, jigs, machine panels, and equipment assemblies requiring a 3/8-16 locking index plunger with a knobless threaded stud mount.

Installation Notes

Installation is typically performed by mechanical technicians or machine builders. Power down or de-energize any associated equipment before servicing or replacing index plungers in a panel or fixture assembly. Ensure the receiving tapped hole matches the 3/8-16 thread specification before installation. Do not exceed the rated end force by applying external impact or excessive loading to the plunger shaft.