Gibraltar G10-3040JN Phenolic 3 Arm Knob 5/16-18

Product Description

The GIBRALTAR G10-3040JN is a three-arm phenolic knob designed for manual adjustment and control applications in industrial, HVAC, and mechanical equipment. Constructed from glossy coated phenolic, this knob provides a firm grip and durable finish suited for frequent hand operation. It features a 2-inch head diameter, stands 1 inch high, and accepts a 5/16-18 female threaded insert with a 1/2-inch hole depth. The black glossy finish resists minor abrasion and maintains appearance under regular use. Technicians and assemblers use this knob on equipment panels, valves, and adjustment mechanisms where tool-free operation is required.

This knob is appropriate for residential and light commercial applications where panel-mounted or shaft-mounted hand controls are needed. Common install scenarios include HVAC equipment enclosures, damper adjustment assemblies, control panels, and general mechanical equipment requiring a secure, hand-tightened fastener. The three-arm design distributes grip force evenly and reduces hand fatigue during repeated adjustments. The 3/4-inch hub diameter and thru female insert style allow straightforward mounting on threaded studs or shafts.

Key Features

• Glossy coated phenolic construction for durability and clean appearance
• Three-arm design provides secure grip for tool-free adjustments
• 5/16-18 female threaded thru insert for standard fastener compatibility
• 2-inch head diameter with 3/4-inch hub diameter
• 1/2-inch hole depth suits typical threaded stud lengths
• Black finish suits panel and enclosure installations

Compatibility

Designed as a standard replacement or OEM-style hand knob for equipment using 5/16-18 threaded studs or shafts requiring a three-arm phenolic knob with a thru female insert style.

Installation Notes

Installation is performed by hand or with basic hand tools and requires no special trade certification, though the knob is commonly fitted by HVAC technicians, mechanical assemblers, and electricians during panel or equipment assembly. Power down or de-energize any associated equipment before servicing panels or adjustment assemblies where this knob is mounted. Do not overtighten the knob onto the threaded stud, as phenolic material can crack under excessive torque applied with tools. Verify thread engagement is sufficient before returning equipment to service.