Gibraltar KN4C15004S5-S21 Lobed Knob 4-point 1/4-20

Product Description

The GIBRALTAR KN4C15004S5-S21 is a 4-point lobed knob constructed from thermoplastic elastomer (TPE) and finished in black. It is designed for hand-tightening and adjustment applications where tool-free operation is required. The 1/4-20 threaded stem and 1.5-inch thread length allow secure engagement with standard 1/4-20 tapped components. With a head diameter of 1.99 inches and an overall height of 0.86 inches, the knob provides a comfortable grip surface for frequent adjustment cycles. The TPE construction offers flexibility and resistance to wear in light industrial and mechanical service environments.

This lobed knob is suited for use in mechanical assemblies, equipment panels, enclosures, and light machinery where hand-operated fastening is needed. Typical applications include HVAC equipment access panels, electrical enclosure latches, pool equipment covers, and general industrial fixtures requiring tool-free adjustments. It is installed by trade technicians and maintenance personnel across a range of service environments.

Key Features

• 4-point lobed design for secure hand grip during frequent adjustment
• Thermoplastic elastomer construction for flexibility and durability
• 1/4-20 threaded stem with 1.5-inch thread length for standard fastener compatibility
• 1.99-inch head diameter provides comfortable, low-force torque application
• Hub diameter of 0.91 inches with hub height of 0.16 inches for compact seating
• Black finish for clean appearance in panel and enclosure applications

Compatibility

Designed as an OEM-style replacement or aftermarket addition for assemblies using standard 1/4-20 threaded fastener points requiring hand-operated lobed knobs.

Installation Notes

Installation requires no special tools — thread the knob onto any 1/4-20 tapped stud or threaded insert by hand. Ensure the mating thread is clean and free of debris before engagement. Do not use power tools to drive or remove this knob, as excessive torque can damage the TPE body or strip the threaded insert. Confirm thread length compatibility with the depth of the receiving hole before installation.