Electro Hardware THS3056M04F16 Thumb Screw 1/4-20

Product Description

The ELECTRO HARDWARE THS3056M04F16 is an aluminum thumb screw with a knurled head, designed for tool-free fastening in light-duty assemblies and panel access applications. The 1/4-20 UNC thread pattern is a widely used standard size, making this screw compatible with a broad range of tapped holes in enclosures, brackets, and equipment covers. Machined from aluminum and left uncoated, it offers a lightweight, corrosion-resistant option where steel fasteners are unnecessary. The knurled head provides a reliable grip surface for hand tightening without tools. With a 1 inch overall length and 3/4 inch thread length, it suits standard panel thicknesses commonly found in electrical, HVAC, and mechanical enclosures.

This thumb screw is suited for use in residential and commercial settings where repeated access to panels, covers, or equipment doors is required. Electricians, HVAC technicians, and mechanical assembly personnel use this type of fastener in control panels, equipment enclosures, junction boxes, and instrumentation housings. The without-shoulder design allows it to thread fully into tapped components without a standoff. Applications include securing removable covers on air handlers, electrical enclosures, and control cabinets where tool-free service access is a priority.

Key Features

• 1/4-20 UNC thread standard for broad compatibility with common tapped holes
• Knurled head allows tool-free hand tightening and loosening
• Aluminum construction provides a lightweight, corrosion-resistant fastener
• Uncoated finish suitable for interior and protected enclosure use
• Without-shoulder design for full thread engagement into tapped components
• Meets QQ-A-225A Comp 2 and T-3 material standards

Compatibility

Designed as a standard 1/4-20 UNC aluminum thumb screw for use in any application with a corresponding tapped hole accepting a 1/4-20 thread. No specific model or system compatibility was stated by the manufacturer for this part number.

Installation Notes

Installation does not require tools under normal conditions. Ensure the mating tapped hole is clean and free of debris before threading to avoid cross-threading the aluminum fastener. De-energize or lock out any electrical or mechanical equipment before servicing panels secured by these screws, in accordance with applicable NFPA 70 or facility lockout-tagout procedures. Do not apply power tools to the knurled head, as aluminum threads can strip under excessive torque.