Gibraltar 5J55A210A8Z001G Lobed Knob 3-point Black

Product Description

The GIBRALTAR 5J55A210A8Z001G is a 3-point lobed knob molded from thermoplastic elastomer (TPE), designed for hand-tightening applications on equipment panels, enclosures, and machine guards. The lobed profile provides a firm, ergonomic grip without tools. It features a 1/2-13 threaded hole with a 0.91-inch thread depth, a 2.17-inch head diameter, and an overall height of 1.08 inches. The TPE material resists oils, minor chemical exposure, and provides a non-slip surface. This knob is installed by technicians and maintenance personnel across HVAC, electrical, and light industrial equipment where frequent manual adjustments are required.

This lobed knob is suited for residential and commercial equipment panels, control enclosures, and machinery that requires tool-free fastening and periodic access. The 1/2-13 thread size covers a wide range of standard threaded studs and posts found in HVAC unit covers, electrical enclosures, and general equipment assemblies. The black TPE finish blends with most panel colors and holds up to shop environments.

Key Features

• 3-point lobed profile for a secure, ergonomic hand grip without tools
• Thermoplastic elastomer (TPE) construction resists oils and minor chemicals
• 1/2-13 threaded hole with 0.91-inch thread depth for standard stud compatibility
• 2.17-inch head diameter provides ample grip surface for frequent adjustments
• Compact hub at 0.81-inch hub diameter and 0.15-inch hub height for low-profile mounting
• Black finish suits most panel and enclosure applications

Compatibility

Designed for use with 1/2-13 threaded studs and posts on equipment panels, control enclosures, machine guards, and similar assemblies requiring tool-free hand fastening.

Installation Notes

Installation requires no special tools — thread the knob onto a 1/2-13 stud by hand and tighten to a snug fit. De-energize any equipment before accessing panels or enclosures where this knob is being installed or replaced. Do not use a wrench or pliers on the lobed head, as over-torquing can crack the TPE body. Verify thread engagement depth does not exceed 0.91 inches to avoid bottoming out the stud.