Electro Hardware THS3023M10F21 Thumb Screw 8-32

Product Description

The ELECTRO HARDWARE THS3023M10F21 is a knurled-head thumb screw designed for hand-tightened fastening applications where tool-free assembly and disassembly are required. Manufactured from Grade 2 steel with a zinc finish, this fastener carries an 8-32 UNC thread and measures 9/16 inches in overall length. The knurled head provides a firm grip for finger-tightening without slipping. This is a shoulder-free design, meaning the threaded portion runs the full usable length of the shank. It is a standard inch-measurement fastener suited for general-purpose assembly work across a range of industries, including electrical enclosures, HVAC equipment panels, and light mechanical assemblies. Licensed tradespeople and assemblers install these where repeated panel removal or access is expected.

This thumb screw is commonly used in control panel covers, junction box lids, instrument enclosures, and equipment access doors where frequent removal is part of routine service. The 8-32 UNC thread size is widely used in light-duty electrical and mechanical assemblies. Its zinc finish provides basic corrosion resistance suitable for indoor and sheltered installations. The compact head diameter of 3/8 inches keeps the fastener low-profile in tight panel layouts.

Key Features

• Knurled head design allows tool-free hand-tightening and removal
• 8-32 UNC thread standard for broad compatibility with common tapped holes
• Grade 2 steel construction provides reliable tensile strength for light-duty fastening
• Zinc finish offers corrosion resistance for indoor and sheltered environments
• Without-shoulder design provides full-length thread engagement
• Meets ASTM B633 and QQ-S-633 Type 1 standards

Compatibility

Designed as a standard 8-32 UNC inch-series thumb screw for use in any application with a corresponding 8-32 tapped hole, including electrical enclosures, HVAC equipment panels, and general mechanical assemblies.

Installation Notes

Installation is performed by hand or with light tool assistance into a pre-tapped 8-32 UNC hole. Ensure the mating tapped hole is clean and free of debris before threading in the fastener. Do not overtighten, as the knurled-head form factor is intended for hand-torque applications and excessive force can damage the thread or head. Follow applicable assembly and electrical enclosure codes when used in panel or equipment installations.