Electro Hardware THS1099M10F21 Thumb Screw 10-32

Product Description

The ELECTRO HARDWARE THS1099M10F21 is a knurled head thumb screw designed for tool-free fastening in light mechanical assemblies, enclosures, and panel applications. Machined from Grade 2 steel with a zinc finish for corrosion resistance, this thumb screw features a 10-32 UNC thread and measures 15/16 inches in overall length. The knurled brass head provides secure finger grip for hand-tightening without a driver. The shoulder design supports precise positioning and prevents over-insertion in applications where alignment and controlled depth matter. This fastener is installed by technicians, assemblers, and field service professionals working on equipment enclosures and access panels.

This thumb screw is suited for residential and commercial equipment assemblies where quick-release or frequently accessed panel fastening is needed. The 10-32 UNC thread is a common size in electrical enclosures, HVAC control panels, and light industrial equipment. The shoulder diameter of 3/8 inches and shoulder length of 1/8 inches make it appropriate for applications requiring a bearing surface or guided fit through a clearance hole. Meets multiple military and ASTM standards including ASTM B633, making it appropriate for controlled environments.

Key Features

• Knurled brass head for tool-free hand tightening and firm grip
• 10-32 UNC thread standard for broad compatibility with inch-system hardware
• With-shoulder design for alignment control and controlled insertion depth
• Zinc finish over Grade 2 steel provides corrosion resistance
• Meets ASTM B633 and multiple federal quality standards
• Compact head profile: 7/16 inches diameter, 3/16 inches height

Compatibility

Designed as an OEM-style replacement or service fastener for equipment enclosures, panels, and assemblies using 10-32 UNC threaded inserts or tapped holes in inch-measurement systems.

Installation Notes

Install by hand-threading into a 10-32 UNC tapped hole or threaded insert. Power down and de-energize any electrical enclosure before removing or replacing panel fasteners. No tools are required for standard installation; avoid applying rotational tool force to the knurled head, as the head material is brass and susceptible to damage under excessive torque. Follow applicable equipment manufacturer guidelines for panel fastener torque and re-installation procedures.