Gibraltar KN4X-5X-B4--S-- Ball Knob 1-15/32 in Black

Product Description

The GIBRALTAR KN4X-5X-B4--S-- is a ball-style control knob molded from thermoplastic elastomer (TPE) for a firm, comfortable grip on threaded fasteners and shafts. The knob measures 1.47 inches in diameter and 1.40 inches in height, with a hub diameter of 0.75 inches. The threaded blind hole accepts multiple thread sizes, making this a versatile choice across machine assemblies, fixtures, and industrial equipment. Technicians and equipment builders use this type of knob wherever a tool-free, hand-tightened adjustment point is needed. The TPE construction resists oils and provides a non-slip surface even in greasy shop environments.

This ball knob is suited for light industrial, mechanical, and trade applications where quick manual adjustment is required without tools. Typical installations include machine guards, fixture clamps, jig stops, panel assemblies, and control levers. The black finish blends with standard industrial hardware. The knob ships individually and can be threaded directly onto any compatible fastener or stud in the accepted thread sizes listed in the specifications below.

Key Features

• Thermoplastic elastomer construction provides oil resistance and a non-slip grip surface
• 1.47 inch diameter ball profile allows full hand-tightening without tools
• Accepts six thread sizes: 1/4-20, 1/4-28, 5/16-18, 5/16-24, M6, and M8
• Hole depth of 0.71 inches accommodates standard stud engagement lengths
• Hub diameter of 0.75 inches provides a stable seating surface against mating components
• Black color finish for a clean, consistent appearance in assembled equipment

Compatibility

Designed as a direct-thread replacement or new-installation ball knob for any threaded stud or fastener sized 1/4-20, 1/4-28, 5/16-18, 5/16-24, M6, or M8 in light industrial and mechanical assemblies.

Installation Notes

Installation requires no special tools — thread the knob onto a compatible stud or bolt by hand and tighten to the desired clamping force. Ensure the mating stud length does not exceed the 0.71 inch hole depth to avoid bottoming out before full clamping load is achieved. Power down or de-energize any equipment before servicing or replacing adjustment knobs on live assemblies. Inspect the TPE body for cracking or deformation periodically in high-cycle or high-temperature environments.