Gibraltar KN5C----S3--S22 Tapered Knob 5/16-18

Product Description

The GIBRALTAR KN5C----S3--S22 is a female insert tapered knob manufactured from thermoplastic and finished in black. It provides a secure, ergonomic gripping point for threaded fastener applications where a hand-tightened control knob is required. The knob accepts a 5/16-18 threaded stud or screw through its female insert mount, with a hole depth of 0.51 inches. Overall length is 2.0 inches, with a head diameter of 1.38 inches and a base diameter of 0.75 inches. The tapered profile delivers a comfortable grip surface and a clean, finished appearance on panels, enclosures, and equipment assemblies.

This knob is suited for use in light industrial, HVAC, electrical, and mechanical equipment applications where a removable or adjustable fastening point is needed. It is typically installed on control panels, access covers, equipment enclosures, and ductwork assemblies. The female insert design allows the knob to thread directly onto an existing stud or bolt without additional hardware. Technicians working on HVAC units, electrical panels, and related trade equipment commonly use this style of knob as a replacement or upgrade for worn or missing panel hardware.

Key Features

• Female insert mount accepts 5/16-18 threaded fasteners
• Hole depth of 0.51 inches for secure thread engagement
• Thermoplastic construction provides lightweight durability
• Tapered profile for comfortable hand grip
• 1.38-inch head diameter and 2.0-inch overall length for standard panel applications
• Black finish suits most panel and enclosure aesthetics

Compatibility

Designed as an OEM-style replacement or standard component for equipment panels and enclosures requiring a 5/16-18 female insert tapered knob.

Installation Notes

Installation requires no special tools — thread the knob directly onto an existing 5/16-18 stud by hand. Before replacing a knob on live electrical or HVAC equipment, power down the unit and follow applicable lockout/tagout procedures. Do not overtighten, as the thermoplastic insert can strip under excessive torque. Verify thread engagement depth is appropriate for the stud length before finalizing installation.