Gibraltar KN8C----F7SB-21 Lobed Knob 8-point 2.48 in

Product Description

The GIBRALTAR KN8C----F7SB-21 is an 8-point lobed knob designed for hand-tightening and adjustment applications across industrial, mechanical, and trade equipment. The knob features a polypropylene inner core with a thermoplastic elastomer overmold, delivering a firm structural base with a grippy, comfortable outer surface. The head measures 2.48 inches in diameter and 0.72 inches in height, giving the user sufficient leverage for tool-free fastening. The matte black finish resists glare and blends into panel and enclosure environments. This part is installed by technicians and assemblers working on equipment that requires frequent manual adjustment.

This lobed knob is suited for use in light industrial equipment, HVAC control panels, electrical enclosures, pump housings, and machinery requiring operator-accessible hand knobs. The 1/2-13 threaded hole and 0.55-inch thread depth allow it to mount directly onto standard 1/2-13 threaded stems or studs. The 8-lobe profile distributes hand force evenly, making it practical in applications where repeated tightening and loosening occur during routine service or calibration.

Key Features

• 8-lobe profile provides even grip and hand force distribution for tool-free operation
• Polypropylene inner core with thermoplastic elastomer overmold for durability and grip
• 2.48-inch head diameter delivers leverage for hand-tightening on 1/2-13 threaded fasteners
• Matte black finish reduces glare in panel and enclosure settings
• Hub diameter of 1.25 inches and overall height of 1.29 inches for compact fitment
• Lightweight at 0.6 pounds for easy handling and installation

Compatibility

Designed as an OEM-style replacement or aftermarket hand knob for equipment using 1/2-13 threaded stems or studs in industrial, mechanical, and trade service applications.

Installation Notes

Installation requires no special tools — the knob threads directly onto a 1/2-13 stem or stud by hand. Confirm the mating stem thread pitch matches 1/2-13 before installation. De-energize or lock out any equipment before servicing adjustable components on powered machinery. Verify hub clearance against surrounding panel or housing surfaces before final seating.