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The GIBRALTAR G10-0140-C is a phenolic ball knob with a female insert mount, designed for use with threaded fasteners and adjustment mechanisms in industrial, mechanical, and machine tool applications. The knob measures 1-1/4 inches in diameter and 1-3/16 inches in height, with a 1/2-13 thread size and a stem size of 1/2-13 x 5/8. The smooth grip surface and durable black phenolic construction make it suited for environments where a reliable, low-cost hand-control component is needed. Licensed tradespeople and equipment technicians install this type of knob on control panels, jigs, fixtures, and adjustment assemblies.
This ball knob is appropriate for residential, commercial, and light industrial settings wherever a female insert knob is required on a 1/2-13 threaded stud or bolt. It is commonly used on machine guards, enclosure doors, equipment panels, and adjustable fixtures. The phenolic material resists moderate heat and provides good insulating properties, making it a practical choice for electrical enclosures and control assemblies where a non-metallic hand knob is specified.
Designed as a direct-fit female insert ball knob for applications using 1/2-13 threaded studs, compatible with standard machine, fixture, and panel assemblies requiring a 1-1/4 inch diameter hand knob.
Installation is performed by threading the knob onto an existing 1/2-13 stud or bolt by hand or with light tool assistance. Ensure the mating stud is clean and free of debris before installation. Do not overtighten, as phenolic material can crack under excessive torque. Power down or de-energize any associated equipment before servicing panels or enclosures where this knob is installed.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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