Gibraltar KN6C----S5--S21 Tapered Knob 3/8-16

Product Description

The GIBRALTAR KN6C----S5--S21 is a female insert tapered knob manufactured from thermoplastic and finished in black. It is designed for use as a manual control or adjustment knob on equipment panels, machinery, and industrial fixtures where a threaded 3/8-16 female insert is required. The tapered profile provides a secure, ergonomic grip for hand-tightening applications. With an overall length of 2.48 inches, a head diameter of 1.6 inches, and a base diameter of 1 inch, this knob is sized for standard panel and equipment mounting tasks. It weighs 0.5 pounds and is sold individually. Installers working on control assemblies, HVAC equipment panels, or light machinery will find this a direct-fit replacement or new-installation component.

This tapered knob is suited for residential and commercial equipment panels, control cabinets, and machinery where hand-adjustable fastening points are needed. The female insert design accepts a 3/8-16 threaded stud or screw, making it compatible with a wide range of standard threaded hardware used across HVAC, electrical, and general industrial applications. The thermoplastic construction offers resistance to light chemical exposure and everyday handling in shop or field environments.

Key Features

• Female insert mount accepts 3/8-16 threaded hardware
• Hole depth of 0.51 inches accommodates standard stud engagement
• Tapered head profile for secure hand-grip operation
• Thermoplastic construction — lightweight and corrosion-resistant
• Black finish — 1.6 inches head diameter, 1 inch base diameter
• Overall length of 2.48 inches with a head height of 2.50 inches

Compatibility

Designed as an OEM-style replacement or new-installation knob for equipment panels and machinery using standard 3/8-16 threaded studs or screws.

Installation Notes

Installation is typically performed by equipment technicians or panel assemblers during maintenance or retrofit work. Power down or de-energize any equipment before replacing control knobs on live panels. Thread the knob onto the 3/8-16 stud by hand and tighten to a snug fit — avoid using tools that could crack the thermoplastic body. Verify thread engagement does not exceed the 0.51 inch hole depth to prevent bottoming out on the stud.