Electro Hardware THS1056M01F21 Brass Thumb Screw 8-32

Product Description

The ELECTRO HARDWARE THS1056M01F21 is a brass thumb screw with an 8-32 UNC thread and a knurled head designed for tool-free fastening in light-duty assembly and panel work. The knurled head provides a secure grip for hand tightening, while the shouldered shank adds precise positioning and alignment support. At 0.8125 inches overall length with a 7/16-inch head diameter, this fastener fits compact enclosures, junction boxes, and equipment panels. The brass construction with zinc finish resists corrosion in typical indoor environments. It meets ASTM B633 and QQ-B-626B Comp 22 Type 1 standards, making it suitable for applications that require traceable material compliance.

This thumb screw is used in residential and commercial settings wherever hand-adjustable fastening is required without tools. Common applications include electrical enclosure panels, instrumentation housings, HVAC control cabinets, and equipment access covers. The 8-32 thread is a widely used size in light sheet metal and electronics assembly. The shoulder provides a mechanical stop, which is useful in applications where consistent depth or alignment between mating parts is required.

Key Features

• 8-32 UNC thread for broad compatibility with standard tapped holes and hardware
• Knurled head allows tool-free hand tightening and loosening
• Shouldered shank at 3/8-inch diameter and 1/8-inch length for precise part alignment
• 7/16-inch head diameter and 3/16-inch head height in a compact form factor
• Brass construction with zinc finish for corrosion resistance in indoor environments
• Meets ASTM B633, QQ-B-626B Comp 22 Type 1 material and finish standards

Compatibility

Designed as a standard 8-32 UNC thumb screw replacement or new installation fastener for panels, enclosures, and equipment housings that accept a shouldered knurled-head thumb screw with a 7/16-inch head and 3/8-inch shoulder diameter.

Installation Notes

This fastener is installed by hand into a pre-tapped 8-32 hole; no tools are required for normal operation, though a screwdriver slot or tool may be used if the application demands higher torque. Verify that mating threads are clean and free of debris before installation to avoid galling the brass threads. Power down any electrical enclosure before servicing internal fasteners. Follow applicable NFPA 70 (NEC) guidelines when working inside electrical panels or control cabinets.