Gibraltar GLH-557-G Gear Lever Knob M12x1.75 Type C

Product Description

The GIBRALTAR GLH-557-G is a Type C gear lever knob designed for industrial and mechanical applications requiring a secure, ergonomic hand-operated control. The knob features a stainless steel shaft paired with a phenolic knob body, combining corrosion resistance with good mechanical durability. The M12x1.75 threaded stem connects to compatible shaft or machine screw interfaces. Key dimensions include a 1.38-inch knob diameter, a 0.47-inch shaft diameter, a 7-inch overall handle length, and a 0.63-inch thread length. The taper end design facilitates positive engagement during installation. This type of lever knob is typically installed by machine maintenance technicians, industrial equipment assemblers, and mechanical service professionals.

This gear lever knob is suited for use on industrial machinery, machine tool controls, jigs, fixtures, and mechanical assemblies that require manual lever or control rod adjustment. The phenolic knob provides a firm grip surface and withstands typical shop-floor operating environments. The stainless steel shaft construction makes it appropriate for installations where moisture or mild chemical exposure is a concern. It ships as a single-unit package and is ordered individually.

Key Features

• M12x1.75 threaded stem for secure attachment to compatible machine threads
• Type C gear lever configuration with taper end for positive installation engagement
• Stainless steel shaft offers corrosion resistance in demanding environments
• Phenolic knob body provides durable grip and resistance to moderate heat and chemicals
• 1.38-inch knob diameter and 7-inch handle length for ergonomic manual operation
• Compact and lightweight at 0.1 pounds, suitable for a wide range of lever control assemblies

Compatibility

Designed as a direct-fit replacement or OEM-style lever knob for industrial machinery and mechanical assemblies using M12x1.75 threaded shaft interfaces.

Installation Notes

Installation is performed by maintenance technicians or mechanical assemblers. Ensure the mating shaft or machine screw is fully powered down or de-energized before installing or removing the lever knob. Thread the M12x1.75 stem onto the shaft by hand before applying a wrench or appropriate hand tool to achieve secure engagement. Do not overtighten, as the phenolic knob body may crack under excessive torque.