Gibraltar KN6C-B5-21-G Ball Knob Female Insert 1-5/8 in

Product Description

The GIBRALTAR KN6C-B5-21-G is a thermoplastic ball knob with a female insert mount designed for manual control and adjustment applications across industrial, mechanical, and trade settings. The knob measures 1-5/8 inches in diameter and 1-1/2 inches in height, with a 1/2-inch hole depth sized to accept a 3/8-16 threaded stud or fastener. The smooth grip surface and black thermoplastic construction provide a durable, functional interface for machine guards, jigs, fixtures, and similar equipment. Technicians and maintenance professionals install this type of knob wherever a tool-free hand adjustment point is needed.

This ball knob is suited for light to medium-duty industrial and trade applications including machine tooling setups, enclosure hardware, clamp assemblies, and panel controls. The female insert design threads directly onto an existing 3/8-16 male stud, making it a straightforward field replacement or new-build component. It is commonly used in manufacturing facilities, HVAC equipment assemblies, and electrical enclosure builds where operator-adjustable hardware is required.

Key Features

• Female insert mount accepts 3/8-16 threaded studs
• 1-5/8 inch diameter ball knob for comfortable hand grip
• 1-1/2 inch overall height with 1/2 inch hole depth
• Smooth grip surface for clean, snag-free operation
• Thermoplastic construction — lightweight and corrosion resistant
• Black finish suitable for general industrial environments

Compatibility

Designed as a standard female insert ball knob for use with 3/8-16 threaded male studs in industrial, mechanical, and trade equipment assemblies.

Installation Notes

Installation requires no special tools — thread the female insert directly onto a compatible 3/8-16 male stud by hand. Confirm the stud length does not exceed the 1/2-inch hole depth to ensure full thread engagement and a secure fit. Deenergize or lock out any associated equipment before replacing control knobs on live machinery per applicable OSHA and facility lockout/tagout procedures.