Gibraltar G10-3040AF Phenolic 3 Arm Knob 1/4-20 Female Insert

Product Description

The GIBRALTAR G10-3040AF is a glossy coated phenolic three-arm knob designed for manual adjustment and clamping applications on machinery, fixtures, and industrial equipment. The knob features a 2-inch head diameter and stands 1 inch high, with a 3/4-inch hub diameter providing a solid grip surface. It uses a 1/4-20 female insert style with a 3/8-inch hole depth, making it a direct threaded fastener for bolts and studs. The glossy black phenolic construction offers good chemical resistance and a firm feel under hand torque. Licensed technicians, machine builders, and maintenance professionals use this type of knob as a tool-free adjustment point on panels, guards, and equipment enclosures.

This knob is suited for use in light industrial, HVAC equipment access panels, electrical enclosures, and mechanical assembly applications where a hand-operated threaded fastener is needed. The three-arm profile distributes grip force evenly and allows adequate torque without tooling. It is appropriate for both shop-floor assembly and field service environments where frequent panel removal or adjustment is required. The black glossy finish is consistent with standard industrial hardware aesthetics and resists minor surface wear.

Key Features

• 2-inch head diameter with three-arm profile for secure hand grip
• 1/4-20 female insert accommodates standard bolts and threaded studs
• 3/8-inch hole depth provides positive thread engagement
• Glossy coated phenolic construction for chemical resistance and durability
• 3/4-inch hub diameter with 1-inch overall height for compact installation
• Black finish suits standard industrial and equipment panel applications

Compatibility

Designed as an OEM-style replacement or aftermarket three-arm knob for machinery, equipment panels, and fixtures using 1/4-20 threaded hardware.

Installation Notes

Installation requires no special tooling — thread the knob onto a 1/4-20 bolt or stud by hand to the appropriate engagement depth. Ensure the mating thread is clean and free of debris before installation to avoid cross-threading the insert. Do not apply impact or power tools to this knob, as the phenolic body and insert are rated for hand torque only.