Electro Hardware THS3002M01F07 Brass Thumb Screw 4-40

Product Description

The ELECTRO HARDWARE THS3002M01F07 is a 4-40 UNC brass thumb screw with a knurled head, designed for hand-tightening applications where tools are not practical or accessible. The head measures 5/16 inches in diameter and 3/16 inches in height, with an overall length of 9/16 inches and a thread length of 3/8 inches. Finished in nickel, this thumb screw meets QQ-B-626B Comp 22 and QQ-N-290A standards, making it suitable for applications with defined material and finish requirements. It is used in light-duty mechanical assemblies, panel fastening, and enclosure hardware installations.

This thumb screw is appropriate for use in electronic enclosures, instrument panels, control boxes, and light mechanical assemblies where frequent hand-adjustment or removal is required. The 4-40 UNC thread size is common in low-voltage electronics, HVAC control panels, and precision equipment housings. It is typically installed by electricians, HVAC technicians, and equipment assemblers working with panel-mounted components.

Key Features

• 4-40 UNC thread for compatibility with standard light-duty fastening applications
• Knurled head allows secure hand-tightening without tools
• Brass construction with nickel finish for corrosion resistance
• Meets QQ-B-626B Comp 22 and QQ-N-290A material and finish standards
• Thread length of 3/8 inches provides adequate engagement for panel thicknesses
• Compact head profile: 5/16 inches diameter, 3/16 inches height

Compatibility

Designed as a standard 4-40 UNC thumb screw for use in electronic enclosures, instrument panels, and control assemblies requiring hand-removable fasteners.

Installation Notes

This thumb screw is installed by hand in pre-tapped 4-40 UNC holes. Power down any electrical equipment before servicing panel fasteners. Avoid cross-threading by starting the screw straight and finger-tight before seating fully. Do not use power tools on thumb screws, as the knurled head is not designed for wrench or driver torque.