Gibraltar 5A03B944A8Z001G Lobed Knob 4-point Black

Product Description

The GIBRALTAR 5A03B944A8Z001G is a 4-point lobed knob constructed from thermoplastic elastomer (TPE) in a black finish. Lobed knobs provide a tool-free grip surface for manual adjustment, clamping, and fastening applications across industrial, mechanical, and HVAC equipment. This knob features a 3/8-16 threaded stem with a 1.75-inch thread length, a 1.99-inch head diameter, and an overall height of 0.86 inches. The TPE material offers a firm yet slightly compliant grip surface that is resistant to oils and common shop chemicals. Electricians, HVAC technicians, and equipment assemblers use knobs of this type for panel covers, access doors, and adjustable component mounting.

This lobed knob is suited for light industrial and commercial equipment applications where hand-tightened fastening is required without tools. Typical uses include equipment enclosure latching, control panel adjustments, jig fixtures, and service access covers. The 3/8-16 thread size is a standard coarse-thread fastener specification found widely in North American mechanical assemblies. The compact hub height of 0.16 inches keeps the installed profile low where clearance is limited.

Key Features

• 4-point lobed design provides positive hand grip for tool-free tightening and loosening
• Thermoplastic elastomer construction offers oil resistance and a firm, tactile grip surface
• 3/8-16 coarse-thread stem is a widely standardized fastener size in industrial and HVAC equipment
• 1.75-inch thread length accommodates standard panel and bracket thicknesses
• Low hub height of 0.16 inches suits installations with limited clearance above the mounting surface
• Black finish resists fading and maintains appearance in shop and field environments

Compatibility

Designed as a standard 3/8-16 threaded lobed knob for use in industrial, mechanical, and HVAC equipment assemblies requiring tool-free manual fastening.

Installation Notes

Verify the mating thread in the panel or component is 3/8-16 before installation. Hand-tighten only — lobed knobs are not designed for torque wrench application. Ensure the thread engagement length does not exceed the available threaded depth in the receiving component to avoid thread damage. Depressurize or de-energize associated equipment before servicing any access panel or cover secured by this knob.