Gibraltar 5A03B941A8Z001G Lobed Knob 4-point 3/8-16

Product Description

The GIBRALTAR 5A03B941A8Z001G is a 4-point lobed knob made from thermoplastic elastomer (TPE) in black. Lobed knobs provide manual grip control for adjusting, clamping, or securing threaded fasteners without tools. This knob accepts a 3/8-16 threaded stem with 1 inch of thread engagement. The TPE construction offers a firm yet comfortable grip surface, making it well suited for frequent hand adjustments in light industrial, HVAC panel, or equipment enclosure applications. With a head diameter of 1.99 inches and an overall height of 0.86 inches, this is a compact, low-profile knob suitable for space-limited mounting locations.

This lobed knob is used wherever a tool-free hand adjustment point is needed on threaded fasteners. Common applications include HVAC equipment access panels, control enclosures, light industrial machinery, and trade service equipment where technicians need to make repeated manual adjustments. The 3/8-16 thread pattern is a widely used coarse thread standard across equipment platforms, and the 1-inch thread length supports standard fastening depth in most panel and bracket installations.

Key Features

• 4-point lobed profile for positive hand grip during tool-free adjustments
• Thermoplastic elastomer construction for firm grip and durability
• 3/8-16 threaded stem with 1 inch of thread length
• Head diameter of 1.99 inches for comfortable palm engagement
• Low-profile design at 0.86 inches overall height
• Black finish, suitable for panel and enclosure applications

Compatibility

Designed as a standard replacement or original-install lobed knob for 3/8-16 threaded fastener applications in light industrial, HVAC, and equipment enclosure settings.

Installation Notes

Installation requires no special tools — thread the knob onto any compatible 3/8-16 stud or bolt by hand. Ensure the mating thread is clean and free of debris before installation. Do not exceed hand-tightening torque, as over-torquing a TPE knob body may cause cracking or thread damage. Confirm power is removed from any electrical enclosure before accessing panel hardware.