Gibraltar KN6C----B7SL-21 Ball Knob Female Insert 1-7/8 in

Product Description

The GIBRALTAR KN6C----B7SL-21 is a thermoplastic ball knob with a female insert mount designed for use on threaded fasteners and adjustment mechanisms across a wide range of industrial, mechanical, and trade applications. The knob measures 1.88 inches in diameter and 1.75 inches in height, offering a comfortable grip profile for hand-tightening tasks. The female insert accepts a 3/8-16 thread and provides a hole depth of 0.55 inches, making it suitable for standard fastener engagement. The black thermoplastic construction resists corrosion and handles routine shop and field conditions without degradation.

This ball knob is well suited for use on machinery guards, equipment enclosures, panel latches, jigs, fixtures, and adjustment handles found in HVAC, electrical, plumbing, and general mechanical service environments. The 3/8-16 female thread is one of the most common sizes in light-to-medium industrial hardware, making this knob a practical replacement or upgrade for worn or damaged hand-tighten hardware on equipment panels and service access covers. It is typically installed by maintenance technicians, equipment fabricators, and trade professionals performing field repairs or panel work.

Key Features

• Female insert mount with 3/8-16 thread for straightforward installation onto standard threaded studs or bolts
• 1.88-inch ball diameter provides a secure, ergonomic grip for hand-tightening
• 0.55-inch hole depth ensures adequate thread engagement on standard fastener lengths
• 1.0-inch hub diameter for stable seating against panel surfaces
• Thermoplastic construction resists corrosion and is lightweight at 0.5 pounds per unit
• Black finish suits most equipment panel aesthetics

Compatibility

Designed as an OEM-style replacement or service upgrade for equipment and machinery using 3/8-16 female-insert ball knobs in industrial, mechanical, and trade service applications.

Installation Notes

Installation requires no special tools — thread the knob onto any compatible 3/8-16 male stud or bolt by hand. Confirm that fastener engagement depth does not exceed the 0.55-inch hole depth to avoid bottoming out the insert. Power down or de-energize any equipment before accessing panels or hardware where this knob is being installed or replaced. Do not over-torque; this knob is designed for hand-tightening only.