Gibraltar ALHA-5-G Lobed Knob 4 Point Aluminum

Product Description

The GIBRALTAR ALHA-5-G is a 4-point lobed knob machined from 6063-T5 aluminum, designed for tool-free manual adjustment and clamping applications in industrial, mechanical, and trade service environments. The 2.5-inch head diameter provides generous grip surface for confident hand-tightening without tools. A 3/8-16 threaded stem with 1.75 inches of thread length allows direct engagement with standard fastener hardware. Weighing 0.17 pounds, this knob is lightweight yet durable, making it a reliable choice for equipment panels, fixtures, jigs, and adjustable assemblies where repeated hand operation is required.

This lobed knob is suited for use in light industrial machinery, workholding fixtures, HVAC equipment access panels, electrical enclosures, and general mechanical assemblies. The 4-lobe profile distributes hand load evenly across contact points, reducing fatigue during frequent adjustments. The aluminum construction resists corrosion in moderate environments. Installation requires no specialized tools — the knob threads directly onto a 3/8-16 stud or bolt. It is appropriate for interior and sheltered exterior applications where aluminum hardware is acceptable.

Key Features

• 4-point lobed profile for secure, comfortable hand-tightening grip
• 2.5-inch head diameter for maximum hand leverage without tools
• 3/8-16 threaded stem — compatible with standard UNC fastener hardware
• 1.75-inch thread length provides deep thread engagement for secure clamping
• 6063-T5 aluminum construction offers corrosion resistance and low weight
• Lightweight at 0.17 pounds — suitable for panel-mounted and portable equipment

Compatibility

Designed as a direct-fit manual adjustment knob for any application using a 3/8-16 threaded stud or fastener where a lobed aluminum hand knob is specified.

Installation Notes

Installation is performed by hand — thread the ALHA-5-G knob directly onto a 3/8-16 stud or bolt. Ensure the mating thread is clean and free of debris before engagement to avoid cross-threading. Do not use power tools or wrenches to drive this knob, as overtightening may damage the aluminum threads. Follow applicable equipment manufacturer guidelines for clamping load requirements.