Electro Hardware THS3042M10F21 Thumb Screw 10-32

Product Description

The ELECTRO HARDWARE THS3042M10F21 is a steel knurled head thumb screw with a 10-32 UNC thread size and a zinc finish. It measures 9/16 inches in overall length with a 3/8-inch thread length. The head diameter is 7/16 inches (0.4375 inches) and the head height is 3/16 inches (0.1875 inches). The head material is brass, while the body is steel with a Material Grade 2 designation. This fastener is designed for hand-tightened applications where tools are not required. It is installed by electricians, HVAC technicians, enclosure fabricators, and equipment assemblers working with standard inch-series hardware.

This thumb screw is suited for panel assemblies, equipment enclosures, access covers, and instrument housings where frequent removal and reinstallation by hand is required. The knurled head provides grip without tooling. The zinc finish provides basic corrosion resistance suitable for interior or protected environments. The without-shoulder configuration allows direct thread engagement into a tapped hole or nut. Sold individually, with a minimum order quantity of 2.

Key Features

• 10-32 UNC thread for compatibility with standard inch-series tapped holes and nuts
• Knurled brass head allows secure hand-tightening without tools
• Zinc finish over steel body provides corrosion resistance for indoor and sheltered applications
• Without-shoulder design for direct thread engagement
• Meets multiple standards including ASTM B633, QQ-S-763, and QQ-N-290A
• 9/16-inch overall length with 3/8-inch thread engagement length

Compatibility

Designed as a standard inch-series 10-32 UNC thumb screw for use in panel enclosures, equipment covers, and assemblies requiring hand-removable fasteners without shoulder clearance requirements.

Installation Notes

This fastener is installed by hand into a pre-tapped 10-32 UNC hole or mating nut. Ensure the mating thread is clean and free of debris before installation. Do not use power tools to drive this thumb screw, as the knurled head is designed for hand torque only. For enclosure or panel work, de-energize all electrical circuits before accessing internal components.