Gibraltar G10-0033-T Ball Knob Female Insert 1-3/8 in

Product Description

The GIBRALTAR G10-0033-T is a phenolic ball knob with a female insert mount designed for manual adjustment and control applications across industrial, mechanical, and equipment assembly environments. The knob measures 1-3/8 inches in diameter and 1-9/32 inches in height, with a smooth grip surface and a red finish for easy visual identification. The female insert accepts a 1/4-20 threaded fastener, making it compatible with standard machine screws and threaded studs. Machinists, equipment assemblers, and maintenance technicians install this type of knob wherever a secure, hand-operated grip is needed on a threaded shaft or panel-mounted stud.

This ball knob is suited for use on machine tools, jigs, fixtures, control panels, and general industrial equipment where repeated manual adjustment is required. The phenolic construction provides good resistance to heat, chemicals, and mechanical wear in typical shop and plant environments. The female insert style allows the knob to be threaded directly onto an exposed stud or screw without requiring a through-hole, making it a practical choice for blind-mount applications. The compact hub diameter of 5/8 inch keeps the profile low-clearance in tight assembly layouts.

Key Features

• Female insert mount accepts 1/4-20 threaded fasteners for direct stud or screw installation
• 1-3/8 inch diameter phenolic ball provides a firm, smooth grip surface
• 3/8 inch hole depth accommodates standard stud engagement lengths
• Red color aids visual identification in multi-knob panel layouts
• Phenolic material offers resistance to heat, shop chemicals, and wear
• Compact 5/8 inch hub diameter suits tight-clearance mounting locations

Compatibility

Designed as a standard replacement or new-installation ball knob for equipment and machinery using 1/4-20 threaded studs or machine screws requiring a female insert style knob.

Installation Notes

De-energize or lock out any equipment before servicing or replacing knobs on control panels or powered machinery, following applicable LOTO procedures. Thread the knob onto the stud by hand until snug; do not over-tighten phenolic hardware as the material can crack under excessive torque. A general-purpose hand tool may be used to hold the stud during installation if needed. Verify thread engagement does not exceed the 3/8 inch hole depth to avoid bottoming out and stripping the insert.