Electro Hardware THS3008M10F21 Steel Thumb Screw 6-32

Product Description

The ELECTRO HARDWARE THS3008M10F21 is a knurled-head steel thumb screw designed for hand-tightened fastening applications where tools are not required or practical. Manufactured to a 6-32 UNC thread standard with a zinc finish over Grade 2 steel, this fastener delivers corrosion resistance suitable for light industrial, electrical enclosure, and panel assembly use. The knurled head profile provides grip for finger-tightening, and the screw ships without a shoulder, making it a straightforward replacement or new-install fastener for standard 6-32 tapped holes. Licensed tradespeople and assembly technicians working on enclosures, control panels, and equipment access covers are the primary installers.

This thumb screw is suited for applications requiring frequent hand-access removal and reinstallation without tools, such as electrical control panel covers, HVAC equipment access panels, junction box lids, and light-duty mechanical assemblies. The 6-32 UNC thread is one of the most common fine-pitch machine screw threads found in electrical and electronic enclosures. The zinc finish meets ASTM B633 and QQ-S-633 Type 1 standards, providing a baseline level of corrosion protection for indoor and sheltered installations.

Key Features

• 6-32 UNC thread for compatibility with standard machine screw tapped holes
• Knurled head design allows secure finger-tightening without tools
• Grade 2 steel construction with zinc finish meeting ASTM B633 and QQ-S-633 Type 1
• Without-shoulder design for straightforward thread engagement
• 3/8 inch thread length with 9/16 inch overall length
• 5/16 inch head diameter with 3/16 inch head height for low-profile clearance

Compatibility

Designed as a standard replacement or new-installation thumb screw for any application using 6-32 UNC tapped holes requiring hand-tightened fastening.

Installation Notes

Installation requires no tools given the knurled head design, but torque-sensitive applications should verify that finger-tight seating is sufficient for the assembly requirements. Always de-energize electrical panels and enclosures before removing or installing fasteners on live equipment covers, following applicable NEC guidelines. Verify that the mating tapped hole thread standard matches 6-32 UNC before installation to avoid cross-threading or thread damage.