Gibraltar 5B50B933A8Z001G Lobed Knob 5-point Tpe Black

Product Description

The GIBRALTAR 5B50B933A8Z001G is a 5-point lobed knob constructed from thermoplastic elastomer (TPE) and finished in black. It features a 1.91-inch head diameter and a 5/16-18 threaded stem with 1.5 inches of thread length. The lobed profile provides a secure, hand-grip surface without the need for tools, making it well suited for frequent adjustment applications on equipment panels, enclosures, jigs, and fixtures. The TPE construction offers durability and a degree of grip compliance that bare metal or rigid plastic knobs do not provide. Installers across HVAC, electrical, and general industrial trades use this style of knob wherever tool-free fastening or adjustment is required.

This lobed knob is appropriate for light-duty to medium-duty fastening tasks in both residential and commercial settings. Typical applications include equipment access panels, instrument housings, machine guards, control enclosures, and service covers where repeated hand-tightening cycles are expected. The 5/16-18 UNC thread is a common fastener size found across a broad range of manufactured assemblies and aftermarket hardware applications.

Key Features

• 5-point lobed profile for confident hand-grip and tool-free operation
• 1.91-inch head diameter provides a wide gripping surface
• Thermoplastic elastomer construction resists impact and provides tactile grip
• 5/16-18 UNC threaded stem with 1.5-inch thread length
• 0.93-inch hub diameter and 1.09-inch overall height for compact installation footprint
• Lightweight at 0.11 pounds — suitable for weight-sensitive assemblies

Compatibility

Designed as a standard replacement or original-fit lobed knob for equipment and enclosures using a 5/16-18 UNC threaded stud or insert. Confirm thread engagement depth against the 1.5-inch thread length before installation.

Installation Notes

Installation requires no special tools — hand-tighten onto any 5/16-18 UNC threaded stud or mating insert. Verify that the mating thread length does not exceed the 1.5-inch stem to prevent bottoming out before the assembly is secure. Power down or de-energize any equipment before servicing panels or covers where this knob is used. Do not use impact drivers or wrenches, as over-torquing may damage the TPE body or the threaded insert.