Gibraltar SKNL-4-G Knob Handle Plunger 1/2-13

Product Description

The GIBRALTAR SKNL-4-G is a non-locking knob handle plunger designed for indexing, positioning, and clamping applications in industrial and mechanical assemblies. It features a 1/2-13 thread size with a thread length of 0.875 inches and a body length of 1.13 inches. The plunger delivers an initial end force of 1 pound and a final end force of 10 pounds, making it suitable for light-duty spring-loaded positioning work. The knurled knob head measures 1.0 inch in diameter and 0.38 inches in height, providing a secure manual grip without the need for tools. Machinists, millwrights, and assembly technicians install this component in jigs, fixtures, and machine tool setups.

This plunger is used in applications requiring a simple, tool-free, spring-loaded locating or holding mechanism. It fits into tapped holes where a 1/2-13 thread is specified. Typical scenarios include fixture plates, indexing tables, panel assemblies, and equipment enclosures where a repeatable manual-engagement plunger is required. The non-locking design allows the plunger to retract and extend freely without a locking mechanism, which suits applications where quick repositioning is needed.

Key Features

• Non-locking plunger design allows free retraction and extension without a locking element
• Knurled knob head provides tool-free manual operation and a firm grip
• Spring force range of 1 pound initial to 10 pounds final end force suits light-duty positioning tasks
• 1/2-13 thread size with 0.875 inches of thread engagement length
• Maximum plunger diameter of 0.248 inches with a tight tolerance of +0.001/-0.000 inches
• Compact body length of 1.13 inches fits in space-constrained assemblies

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial fixtures, jigs, and machine assemblies requiring a 1/2-13 threaded non-locking knob handle plunger.

Installation Notes

Installation is performed by threading the plunger body into a pre-tapped 1/2-13 hole by hand or with a spanner if needed. Ensure the mating tapped hole is clean and free of debris before installation. Disengage or de-energize any moving machinery before servicing or replacing plunger components. Do not exceed the rated end force range, as over-compression can damage the internal spring.