Gibraltar 5B50B931A8Z002G Lobed Knob 5-point Black

Product Description

The GIBRALTAR 5B50B931A8Z002G is a 5-point lobed knob constructed from thermoplastic elastomer (TPE) in a black finish. Designed for hand-tightening applications where tools are not practical or permitted, this knob provides a comfortable, slip-resistant grip across its 1.91-inch head diameter. The 5/16-18 threaded stem with a 1-inch thread length allows direct mounting to compatible threaded shafts, studs, or inserts. At 0.1 pounds, it is a lightweight hardware component suited for panel assemblies, enclosures, access covers, and equipment requiring frequent manual adjustment. Licensed tradespeople and equipment assemblers install this type of fastening knob across HVAC, electrical, and general industrial applications.

This lobed knob is used wherever a secure, tool-free hand grip is needed on threaded fasteners. Typical applications include control panel doors, filter access covers, junction box lids, and equipment mounting fixtures in both residential and commercial settings. The TPE construction resists oils, mild chemicals, and repeated handling without degrading grip quality. It is suited for light to moderate clamping loads where finger-tightening torque is sufficient for the assembly.

Key Features

• 5-point lobed profile provides multi-finger grip and consistent hand torque
• Thermoplastic elastomer construction offers oil resistance and a non-slip surface
• 1.91-inch head diameter delivers adequate leverage for hand tightening
• 5/16-18 threaded stem with 1-inch thread length for broad fastener compatibility
• Lightweight at 0.1 pounds — suitable for weight-sensitive panel and enclosure assemblies
• Black finish for low-visibility integration into equipment housings

Compatibility

Designed as a direct-thread replacement or upgrade knob for any application using a 5/16-18 threaded shaft, stud, or insert requiring hand-tightening access.

Installation Notes

Installation requires no special tools — thread the knob onto a compatible 5/16-18 stud or shaft by hand. Ensure the mating thread is clean and free of debris before installation. Do not use power tools to drive or remove this knob, as TPE components are not rated for high-torque power driving. Verify that finger-tightening torque is sufficient for the clamping load required by the assembly before use.