Gibraltar G10-2890-A Knurled Fluted Knob 2.5 in Plastic

Product Description

The GIBRALTAR G10-2890-A is a knurled fluted knob with a 2.5-inch head diameter and a plastic body construction. It features a female threaded insert sized for a 5/16-18 fastener, making it a hand-tightening control component used in light machinery, jigs, fixtures, enclosures, and industrial equipment. The knurled and fluted outer profile provides secure grip without tools. This type of knob is typically installed by maintenance technicians, machine operators, and equipment assemblers working in manufacturing, fabrication, or MRO applications.

This knob is suited for applications where tool-free hand adjustment is required. Common installations include panel doors, guard covers, fixture clamps, and equipment access points. The female insert design accepts a threaded stud or screw, allowing the knob to be threaded directly onto a fixed post or bolt. The plastic construction keeps the assembly lightweight and resistant to corrosion in moderate-duty environments.

Key Features

• 2.5-inch head diameter for a full hand grip
• Knurled and fluted outer surface for tool-free tightening and loosening
• Female threaded insert accepts 5/16-18 fasteners
• Plastic construction — lightweight and corrosion resistant
• Designed for hand-adjustment applications in fixtures, panels, and machinery

Compatibility

Designed as an OEM-style replacement or direct fitment knob for equipment and fixtures using a 5/16-18 threaded stud or bolt interface.

Installation Notes

Installation requires no special tools — thread the female insert directly onto a 5/16-18 stud or cap screw by hand. Verify thread engagement is sufficient before applying load. Do not overtighten, as the plastic body can crack under excessive torque. Ensure the mating stud protrudes enough to engage the full depth of the insert for secure retention.