Gibraltar KN8C1500F7S--21 Lobed Knob 8 Point Black

Product Description

The GIBRALTAR KN8C1500F7S--21 is an 8-point lobed knob designed for manual adjustment and control applications across industrial, mechanical, and equipment assembly environments. The knob features a polypropylene inner core with a thermoplastic elastomer (TPE) overmold, combining a rigid structural body with a softer, grippy outer surface that improves hand torque without tools. The head diameter measures 2.48 inches, providing a wide grip surface for gloved or bare-hand operation. The 1/2-13 threaded stem with a 1.5-inch thread length allows secure fastening to standard threaded shafts or inserts in panels, fixtures, and assemblies.

This lobed knob is suited for use on machinery panels, enclosures, jigs, fixtures, and adjustment mechanisms where frequent hand-tightening or loosening is required. The matte black finish reduces glare and provides a clean appearance in both shop and field environments. It is appropriate for light-duty to medium-duty clamping and positioning applications in manufacturing, HVAC equipment, and industrial assembly. The 8-lobe profile distributes grip force evenly, reducing operator fatigue during repeated adjustments.

Key Features

• 8-point lobed profile for high hand torque without tools
• Thermoplastic elastomer overmold over polypropylene inner core for durable, comfortable grip
• 2.48-inch head diameter provides a wide, easy-to-grasp surface
• 1/2-13 threaded stem with 1.5-inch thread length for standard hardware compatibility
• Matte black finish resists glare and suits industrial aesthetics
• Lightweight construction at 1 pound per unit

Compatibility

Designed for use with standard 1/2-13 threaded shafts, studs, or inserts commonly found in industrial machinery, equipment panels, jigs, and fixtures.

Installation Notes

Installation requires no special tools — thread the knob onto a compatible 1/2-13 shaft or stud by hand. Ensure the mating thread is clean and free of debris before installation to avoid cross-threading. Verify that thread engagement length is sufficient for the load and application before putting the assembly into service. Do not apply power tools to this knob, as overtightening may damage the thermoplastic hub or strip the mating thread.