Gibraltar G10-2820-G Lobed Knob 4-point Phenolic Black

Product Description

The GIBRALTAR G10-2820-G is a 4-point lobed knob designed for hand-tightening and manual adjustment applications across industrial, mechanical, and equipment assembly settings. Molded from phenolic material, this knob delivers a durable, gloss-finish grip surface that resists chemicals and wear under repeated use. The knob features a 1.5-inch head diameter and a 5/16-18 threaded stem with 1 inch of thread engagement, making it well-suited for fastening to standard machine screws or threaded inserts. Maintenance technicians and assembly professionals install this type of hardware where tool-free adjustments are needed on panels, fixtures, jigs, guards, and control equipment.

This lobed knob is appropriate for use in light industrial and commercial equipment assemblies where frequent hand adjustment is required. The 4-lobe design provides multiple grip points for controlled torque without tools. The phenolic construction handles moderate temperature exposure and general shop environments. It is commonly found on machine guards, enclosure panels, positioning fixtures, and similar equipment requiring repetitive manual fastening. The 5/16-18 thread size is a widely used standard that fits a broad range of bolts, studs, and threaded hardware found in fabrication and equipment maintenance work.

Key Features

• 4-point lobed profile for secure hand grip and tool-free adjustment
• 1.5-inch head diameter provides adequate leverage for manual tightening
• Phenolic construction offers chemical resistance and durability in shop environments
• 5/16-18 stem thread is a standard size compatible with common machine hardware
• 1 inch of thread length provides solid engagement depth
• Gloss black finish for visibility and a clean, finished appearance

Compatibility

Designed as a standard lobed knob replacement or new-installation component for 5/16-18 threaded studs, bolts, or inserts commonly found in light industrial machinery, equipment panels, jigs, and fixtures.

Installation Notes

This knob is installed by hand onto a 5/16-18 threaded fastener or stud. Ensure the mating thread is clean and free of debris before installation. Do not use power tools to drive or remove phenolic knobs, as overtightening can crack the hub. Shut down and de-energize any equipment before adjusting or replacing knobs on powered machinery.