Electro Hardware THS1137M07F16 Thumb Screw 1/4-20

Product Description

The ELECTRO HARDWARE THS1137M07F16 is a 303 stainless steel thumb screw with a knurled head and shoulder, designed for tool-free fastening in assemblies where frequent hand adjustment or removal is required. The 1/4-20 UNC thread is one of the most common inch-series thread sizes in light mechanical and enclosure work. With a 0.500 inch head diameter and 0.250 inch head height, the knurled profile gives a firm grip even in tight quarters. The 303 stainless steel base material provides good corrosion resistance and machinability while meeting QQ-S-763 material standards. The uncoated finish keeps dimensions predictable for close-tolerance applications. Licensed technicians and mechanical assembly professionals use this fastener in panel, enclosure, and access-door applications across HVAC, electrical, and industrial equipment.

This thumb screw is suited for residential and light commercial equipment enclosures, electrical panels, junction boxes, and instrument housings where hand-removable fasteners are preferred over tool-driven hardware. The with-shoulder configuration adds a positive stop and bearing surface, which is useful in sheet-metal and thin-panel assemblies. The 7/8 inch overall length and 1/8 inch shoulder length make it appropriate for moderate-depth panel stock. Tradespeople who regularly service access panels on air handlers, control enclosures, or metering equipment will find this fastener a direct fit for standard 1/4-20 threaded inserts and PEM-style nuts.

Key Features

• 303 stainless steel construction meets QQ-S-763 material standard for corrosion resistance
• 1/4-20 UNC thread — widely compatible with standard inch-series inserts and hardware
• Knurled head allows secure hand tightening without tools
• With-shoulder design provides a positive stop and bearing surface on thin panel stock
• Uncoated finish maintains consistent dimensional tolerances
• 7/8 inch overall length suits standard light-gauge enclosure and panel applications

Compatibility

Designed as an OEM-style replacement or service fastener for equipment using 1/4-20 UNC threaded inserts in panel and enclosure applications. No specific model compatibility was stated in the product data.

Installation Notes

This fastener is typically installed by hand; no driver tool is required, though a light snug with a thumb is sufficient for most panel applications. Before servicing any enclosure or panel, de-energize and lock out the equipment per applicable NFPA 70E or local electrical safety procedures. Do not overtighten — stainless fasteners are susceptible to galling if spun rapidly or forced. Verify thread engagement depth is adequate for the mating insert before final assembly.