Gibraltar 5A03B923A8Z002G Lobed Knob 4-point 1/4-20

Product Description

The GIBRALTAR 5A03B923A8Z002G is a 4-point lobed knob molded from thermoplastic elastomer (TPE) and finished in black. Lobed knobs are hand-operated fastening components used to tighten or loosen a threaded stud or bolt without tools. This knob features a 1/4-20 threaded stem with a 1-inch thread length, giving it a positive grip in standard coarse-thread applications. The TPE construction provides a firm but slightly compliant grip surface that holds up to repeated manual torque cycles in light industrial, HVAC equipment, and enclosure panel applications. It is typically installed by HVAC technicians, electricians, or mechanical assemblers during equipment assembly or field service.

This lobed knob suits residential and light commercial applications where tool-free panel access or component adjustment is required. Common install scenarios include HVAC air handler access doors, electrical enclosure covers, filter-rack assemblies, and equipment service panels. The 4-lobe geometry distributes hand pressure evenly, making it practical in tight spaces where a full hand grip is not always possible. The 1/4-20 thread is a widely used standard size across HVAC, electrical, and general mechanical equipment.

Key Features

• 4-point lobe geometry for tool-free hand tightening and loosening
• Thermoplastic elastomer (TPE) construction for a firm, slightly compliant grip surface
• 1/4-20 threaded stem with 1-inch thread length for broad compatibility with standard coarse-thread fastener applications
• 1.99-inch head diameter provides adequate leverage for comfortable hand torque
• Black finish for a clean, low-profile appearance on panels and enclosures
• Lightweight at 0.06 pounds, suitable for weight-sensitive panel assemblies

Compatibility

Designed as an OEM-style replacement or service-install lobed knob for equipment using 1/4-20 threaded fastener points, typical of HVAC, electrical enclosure, and light mechanical assembly applications.

Installation Notes

Installation requires no special tools — thread the knob onto a 1/4-20 stud or bolt by hand. Before servicing any equipment panel where this knob is being replaced or installed, de-energize the equipment in accordance with OSHA lockout/tagout procedures and applicable NEC requirements. Do not use a wrench or driver on the knob body, as this may crack or deform the TPE material. Verify thread engagement depth against the 1-inch thread length to confirm sufficient fastener engagement for the application.