Electro Hardware THS1003M01F07 Brass Thumb Screw 4-40

Product Description

The ELECTRO HARDWARE THS1003M01F07 is a 4-40 UNC brass thumb screw with a knurled head and integral shoulder, designed for hand-tightened fastening applications in panels, enclosures, and equipment assemblies. The knurled head provides reliable grip without tools, and the shoulder design controls thread engagement depth. The screw is finished in nickel per QQ-N-290A for corrosion resistance. Overall length is 0.6875 inches, with a head diameter of 0.375 inches and a head height of 0.1875 inches. Material is Grade 1 F brass conforming to QQ-B-626B Comp 22. This fastener is suited for electricians, electronics technicians, and panel builders who need a reliable hand-operated fastening solution.

This thumb screw is used in light-duty panel assembly, instrument enclosures, electrical control boxes, and equipment covers requiring tool-free access. The 4-40 UNC thread is a standard size in electronic and instrumentation assemblies. The nickel finish is appropriate for indoor environments where mild corrosion resistance is needed. The shoulder design seats consistently against mating surfaces, making it well-suited for repetitive removal and reinstallation scenarios common in service and maintenance work.

Key Features

• 4-40 UNC thread for compatibility with standard instrumentation and panel fastening applications
• Knurled head allows secure hand tightening without tools
• Integral shoulder controls seating depth and protects mating surfaces
• Grade 1 F brass construction per QQ-B-626B Comp 22
• Nickel finish per QQ-N-290A for corrosion resistance
• Compact profile: 0.375 inches head diameter, 0.1875 inches head height, 0.6875 inches overall length

Compatibility

Designed as a standard 4-40 UNC thumb screw for use in electronic enclosures, instrumentation panels, and equipment assemblies requiring tool-free hand fastening with a shouldered seating design.

Installation Notes

Installation is performed by hand without tools. De-energize any electrical enclosure or panel before installing or removing fasteners to prevent accidental contact with live components. Verify that the mating threaded insert or nut matches the 4-40 UNC thread specification before installation. Do not over-torque by hand, as brass fasteners at this thread size can be damaged by excessive force.