Gibraltar KN6C-B3-21-G Ball Knob Female Insert 1-3/8 in

Product Description

The GIBRALTAR KN6C-B3-21-G is a thermoplastic ball knob with a female insert mount designed for manual control applications in industrial, mechanical, and equipment assembly environments. The knob measures 1-3/8 inches in diameter and 1-9/32 inches in height, with a 3/8-16 female thread and a hole depth of 5/8 inches. Its smooth grip surface and black thermoplastic construction make it a practical choice for panel-mounted controls, jigs, fixtures, and general machine adjustments. Machinists, equipment technicians, and assembly professionals are the primary installers of this hardware component.

This ball knob is suited for use on machine tools, fixtures, control panels, and mechanical assemblies where a hand-tightened fastening point is needed. The 3/8-16 thread size is a common standard thread found across a wide range of industrial equipment. Its compact form factor makes it appropriate for applications with limited clearance. Typical installations include feed stops, clamping screws, and adjustment mechanisms on both benchtop and floor-standing equipment.

Key Features

• Female insert mount accepts a 3/8-16 threaded stud or bolt
• 1-3/8 inch diameter provides a comfortable hand grip surface
• Thermoplastic construction offers lightweight durability and resistance to shop-floor conditions
• Smooth grip surface suited for frequent hand adjustments
• Hole depth of 5/8 inches accommodates standard fastener engagement lengths
• Black finish suitable for general industrial use

Compatibility

Designed as an OEM-style replacement or new-installation ball knob for industrial machinery, fixtures, and equipment assemblies that use a 3/8-16 threaded stud mount.

Installation Notes

Installation is performed by threading the knob onto an existing 3/8-16 male stud or fastener by hand. Ensure the mating stud length does not exceed the 5/8-inch hole depth to avoid bottoming out before full clamping force is achieved. No special tools are required for standard hand-tightened applications. Verify that the mounting stud thread class is compatible with the female insert before assembly.