Electro Hardware THS1053M10F21 Steel Thumb Screw 8-32

Product Description

The ELECTRO HARDWARE THS1053M10F21 is a knurled-head thumb screw designed for hand-tightening applications in trade and industrial assembly. It features an 8-32 UNC thread, a zinc-finished steel body, and a brass knurled head for secure grip without tools. The screw includes a shoulder section measuring 0.375 inches in diameter and 0.125 inches in length, which provides a defined bearing surface for precise part location and panel retention. Overall length is 0.625 inches. This fastener is suited for electrical enclosures, control panels, HVAC access panels, and general sheet metal assemblies where frequent removal and reattachment is required.

This thumb screw is used in light to medium-duty hand-fastening applications across electrical, HVAC, and mechanical panel work. The knurled brass head allows repeated tightening by hand without marring surrounding surfaces. The shoulder design makes it well suited for panels or covers that need consistent positioning at every reinstall. Typical installers include electricians, HVAC technicians, and mechanical contractors working with equipment access doors, junction box covers, and instrument panel assemblies.

Key Features

• 8-32 UNC thread for compatibility with standard tapped holes in light-gauge steel panels
• Knurled brass head allows hand tightening and loosening without tools
• Shoulder diameter of 0.375 inches provides a positive locating surface
• Zinc finish on steel body for corrosion resistance in indoor service environments
• Material Grade 2 steel construction meets multiple ASTM and QQ material standards
• Compact 0.625-inch overall length suits thin panel and cover applications

Compatibility

Designed as a standard 8-32 UNC knurled thumb screw for use in any tapped or threaded insert accepting 8-32 fasteners, including electrical enclosures, HVAC equipment panels, and general industrial assemblies requiring tool-free access hardware.

Installation Notes

De-energize all electrical equipment before removing or installing panel fasteners. Thread engagement should be sufficient to fully engage the 8-32 threads without cross-threading — start by hand and confirm thread alignment before applying torque. The shoulder must seat flush against the mating panel surface to function correctly as a locating feature. Follow applicable NEC or equipment manufacturer guidelines when securing electrical enclosure covers.