Gibraltar ALHA-9M-G Lobed Knob 4 Point Aluminum M16x2

Product Description

The GIBRALTAR ALHA-9M-G is a 4-point lobed knob machined from 6063-T5 aluminum, designed for hand-tightening and manual adjustment applications in mechanical assemblies, fixtures, and industrial equipment. The knob features a 3-inch (76.2 mm) head diameter with four symmetrically spaced lobes that provide a secure, ergonomic grip without tools. The M16x2 threaded stem offers a 44.5 mm thread engagement length, making it suitable for moderate-duty clamping and positioning tasks. At 0.37 pounds, it is lightweight without sacrificing structural integrity. Machinists, maintenance technicians, and fixture builders typically specify this type of knob for jigs, machine guards, and adjustment mechanisms.

This lobed knob is commonly used in industrial machinery, tooling fixtures, and equipment panels where frequent manual adjustments are required. Its aluminum construction keeps overall assembly weight low while providing corrosion resistance in light-duty environments. The M16x2 thread pattern is a standard metric coarse thread, widely used in European and metric-standard machine designs. It is well-suited for both original equipment installations and field replacements on fixtures and adjustment assemblies.

Key Features

• 4-point lobed profile for ergonomic hand grip without additional tools
• 3-inch (76.2 mm) head diameter provides ample torque leverage by hand
• M16x2 metric coarse threaded stem for broad hardware compatibility
• 44.5 mm thread engagement length for secure fastening depth
• 6063-T5 aluminum construction — lightweight and corrosion resistant

Compatibility

Designed as a standard metric replacement or OEM-style lobed knob for mechanical assemblies, fixtures, and industrial equipment using M16x2 threaded hardware.

Installation Notes

Installation is performed by hand or with light tooling — avoid using power tools or impact drivers, which can strip the aluminum threads. Ensure the mating threaded bore is clean and free of debris before installation. Thread engagement should cover the full 44.5 mm stem length for proper clamping force. Follow applicable machine guarding and equipment lockout/tagout procedures before servicing any assembly.