Electro Hardware THN5004M01F16 Brass Thumb Nut 8-32

Product Description

The ELECTRO HARDWARE THN5004M01F16 is a round knurled thumb nut machined from Grade B633 brass with an 8-32 UNC thread. It is designed for hand-tightening applications where tools are not required or practical, making it a common fastener in electrical enclosures, control panels, instrumentation housings, and light mechanical assemblies. The knurled head provides secure grip for finger-tightening, and the uncoated bright brass finish offers natural corrosion resistance suitable for indoor and light-duty service environments. The overall height is 0.281 inches (9/32 inches) and the head diameter is 0.438 inches (7/16 inches).

This thumb nut is suited for residential and commercial applications wherever a reusable, hand-removable fastener is needed on an 8-32 UNC threaded stud or bolt. Electricians and panel builders commonly use this style of nut for access covers, terminal boards, and mounting fixtures that require frequent removal. It also sees use in HVAC controls and instrumentation assemblies where panels are serviced regularly and tool-free access is a practical requirement.

Key Features

• Grade B633 brass construction provides inherent corrosion resistance and electrical conductivity
• Round knurled head design allows secure hand-tightening without tools
• 8-32 UNC thread standard ensures broad compatibility with common machine screw hardware
• Uncoated bright finish — no plating to flake or interfere with electrical contact surfaces
• Compact profile: 0.281 inches overall height and 0.438 inches head diameter for space-constrained installations
• Meets QQ-B-626B Comp 22 material standard

Compatibility

Designed for use with 8-32 UNC threaded studs, screws, and bolts. Compatible with both UNC and UNF thread applications where an 8-32 fit is specified.

Installation Notes

This thumb nut is typically installed by electricians, panel technicians, or mechanical assemblers using finger pressure only — avoid using tools that may deform the knurled head or over-torque the brass threads. Always de-energize and lock out electrical enclosures before servicing fasteners on live panels. Brass is a softer material than steel; do not pair with coarse steel hardware that may gall the threads over repeated use cycles.