Value Collection R40660421 Hex Socket Cap Screw 5-40 Unc

Product Description

The VALUE COLLECTION R40660421 is a hex socket cap screw in 5-40 UNC threading, designed for applications requiring a compact, high-strength fastener with a recessed drive. The 3/32 inch internal hex drive accepts a standard Allen key or hex bit driver, and the screw measures 1/4 inch length under head. Constructed from 18-8 stainless steel, this fastener resists corrosion in wet, mildly acidic, or outdoor environments. It is suited for light mechanical assemblies, instrument panels, electrical enclosures, and equipment housings where a flush or low-profile head is required. Maintenance technicians, electricians, and mechanical contractors commonly specify this style in confined-space fastening applications.

This socket cap screw is used in residential and commercial mechanical, electrical, and instrumentation assemblies. The 5-40 UNC thread is a fine-pitch unified coarse designation commonly found in small-diameter fastening applications within control panels, junction boxes, and light-duty mechanical subassemblies. Its stainless steel construction makes it appropriate for environments where mild corrosion resistance is needed without the cost of exotic alloys.

Key Features

• 5-40 UNC thread for small-diameter, light-load fastening applications
• 3/32 inch hex socket drive for use with standard Allen keys or hex bit drivers
• 1/4 inch length under head for shallow-clearance fastening
• 18-8 stainless steel construction for corrosion resistance in moist or mildly corrosive environments
• Low-profile socket cap head allows flush or recessed installation

Compatibility

Designed as a standard 5-40 UNC hex socket cap screw suitable for use in small mechanical assemblies, control enclosures, instrumentation hardware, and equipment requiring 18-8 stainless steel fasteners with a 3/32 inch hex drive.

Installation Notes

Installation requires a 3/32 inch hex key or Allen driver; use of an incorrect driver size risks rounding the socket. Power down or de-energize any electrical enclosure before fastening work begins. Follow applicable codes such as NEC for electrical enclosures or manufacturer torque guidelines for the mating component material. Avoid over-torquing stainless steel fasteners, as galling can occur without proper anti-seize compound on the threads.