Gibraltar 34170 Non-locking Knob Plunger 1/2-13 Thread

Product Description

The GIBRALTAR 34170 is a non-locking knob-style plunger designed for indexed positioning and retractable pin applications in industrial and mechanical assemblies. It features a 1/2-13 thread size with a 7/8-inch thread length and a knobless threaded stud configuration, meaning a separate knob or handle is not included. The plunger itself measures 0.249 inches in maximum diameter and extends 0.25 inches in projection. Spring force ranges from 2.5 pounds initial end force to 10 pounds final end force. Licensed mechanical professionals and precision assemblers specify this component for fixture, jig, and positioning work where controlled spring tension and repeatable plunger engagement are required.

This plunger is suited for light-duty indexing and positioning applications in machine tool fixtures, workholding assemblies, and industrial equipment. The threaded stud body allows direct mounting into tapped holes, making it a practical choice for OEM equipment builds and maintenance replacement work. The stainless steel construction with zinc finish makes it appropriate for environments where mild corrosion resistance is needed. The 1/4-inch length under the head and 1.937-inch total plunger length allow it to fit into compact assemblies where clearance is limited.

Key Features

• Non-locking plunger type for free retraction and indexed positioning
• Spring force range: 2.5 pounds initial to 10 pounds final end force
• Knobless threaded stud body with 1/2-13 external thread and complementary 3/8-16 stud thread
• Stainless steel construction with zinc finish for corrosion resistance
• Plunger diameter tolerance held to plus 0.001 inches for consistent engagement
• Locking element included for secure installation in the mounting body

Compatibility

Designed as an OEM-style replacement or new-install component for industrial fixtures, jigs, and mechanical assemblies requiring a 1/2-13 threaded mounting hole and a non-locking spring plunger with knobless stud configuration.

Installation Notes

Installation is performed by qualified mechanical assemblers or maintenance technicians. Ensure the mating tapped hole is clean and free of debris before threading in the stud body. De-energize or lock out any equipment the assembly is mounted to before service, per applicable OSHA lockout/tagout procedures. Do not exceed the rated final end force by compressing the plunger beyond its specified travel range.