Gibraltar SKLS-4-G Locking Knob Plunger 1/2-13

Product Description

The GIBRALTAR SKLS-4-G is a locking knob handle plunger with a 1/2-13 thread size and a stainless steel construction. It delivers an initial end force of 0.5 pounds and a final end force of 4 pounds, making it well-suited for positioning and indexing applications that require a secure, repeatable hold. The knurled knob provides positive hand control without tools. The plunger measures 1.38 inches in length with a maximum diameter of 0.249 inches. Thread length is 0.65 inches, and the length under the head or shoulder is 0.9 inches. This type of plunger is typically installed by machinists, tool and die technicians, and maintenance mechanics in industrial and light manufacturing environments.

This plunger is used in applications requiring controlled spring-loaded retention with manual locking capability. Common install scenarios include jigs, fixtures, tooling plates, and machinery panels where a plunger must be held in the retracted or extended position without continuous hand pressure. Stainless steel construction suits environments where corrosion resistance is a factor, such as food processing, washdown areas, and outdoor equipment enclosures.

Key Features

• Locking plunger type holds position without continuous hand pressure
• Knurled knob style allows tool-free hand operation
• Stainless steel body and plunger for corrosion resistance
• Initial end force of 0.5 pounds rising to a final end force of 4 pounds
• Plunger projection of 0.25 inches with a maximum plunger diameter of 0.249 inches
• 1/2-13 thread size with 0.65 inches of thread engagement length

Compatibility

Designed as a standard 1/2-13 threaded locking knob plunger suitable for use in fixtures, jigs, tooling plates, and machinery panels that accept this thread size and plunger diameter.

Installation Notes

Installation is performed by threading the plunger body into a tapped 1/2-13 hole to the desired depth and securing with a jam nut or thread-locking compound as the application requires. Ensure the receiving bore for the plunger tip matches the maximum plunger diameter of 0.249 inches for proper engagement. De-energize or lock out any machine or mechanism before servicing adjacent components. Avoid over-torquing the knob body, as stainless steel threads can gall if installed without lubrication.