Gibraltar 5B40B931A8Z001G Lobed Knob 5-point Black

Product Description

The GIBRALTAR 5B40B931A8Z001G is a 5-point lobed knob molded from thermoplastic elastomer (TPE) for tool-free hand adjustment in light industrial, mechanical, and HVAC equipment applications. The lobed profile provides positive grip across all five points, allowing controlled torque without a wrench. The knob measures 1.52 inches in head diameter with an overall height of 1.09 inches and accepts a 5/16-18 threaded stem with 1 inch of thread engagement. TPE construction resists oils, moderate chemicals, and repeated handling without cracking or deforming. The black finish is standard. Weighing just 0.09 pounds, this knob is a direct hand-adjustment component suited for panels, access covers, and equipment enclosures.

This knob is used wherever a tool-free, hand-tightened fastener is needed on threaded studs or bolted assemblies. Common applications include HVAC equipment access panels, control enclosures, fan shroud assemblies, and general mechanical equipment requiring frequent operator adjustment or removal. The 5/16-18 thread size is a widely used standard fastener size across residential and light commercial equipment. Technicians in HVAC, electrical, and general mechanical trades install this type of knob as a replacement or upgrade over standard hex hardware in service-access locations.

Key Features

• 5-point lobed profile for secure hand grip and controlled tightening torque
• Thermoplastic elastomer (TPE) construction resists oils, chemicals, and repeated use
• 1.52 inch head diameter with 0.69 inch hub diameter for stable seating on panel surfaces
• 5/16-18 threaded stem with 1 inch thread length for broad fastener compatibility
• Overall height of 1.09 inches with a low-profile 0.18 inch hub
• Lightweight at 0.09 pounds — suitable for panels and enclosures where mass matters

Compatibility

Designed as a tool-free hand-adjustment knob for use on any threaded 5/16-18 stud or bolt in panel, enclosure, or mechanical equipment assemblies requiring frequent access.

Installation Notes

A licensed or qualified technician should power down or de-energize any equipment before removing or replacing panel fasteners. No special tools are required for installation — thread the knob onto the 5/16-18 stud by hand and tighten to a firm, snug fit. Do not use a wrench or impact driver on this knob, as TPE lobes are designed for hand torque only and can deform under excessive mechanical force. Follow applicable equipment manufacturer guidelines for panel and enclosure reassembly.