Value Collection R40664481 Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION R40664481 is a hex socket cap screw designed for precision fastening in mechanical, electrical, and structural assemblies. It features a 4-40 UNC thread size, a 3/32 inch internal hex drive, and a 7/8 inch length under head. Constructed from 18-8 stainless steel, this screw offers corrosion resistance suitable for both indoor and outdoor service environments. It is installed using a standard hex key or Allen driver and is a common choice for close-tolerance work where a flush or recessed fastener head is required.

This screw is suited for light-duty mechanical assemblies, instrument panels, control enclosures, electrical junction boxes, and HVAC equipment covers where a small-diameter, fine-thread fastener is needed. The 4-40 UNC thread is a standard size found in electronic hardware, precision instruments, and OEM equipment panels. Installers in electrical, HVAC, and general mechanical trades reach for this size when securing thin-gauge components or attaching cover plates with limited clearance.

Key Features

• 4-40 UNC thread for fine-pitch, secure engagement in tapped holes
• 3/32 inch hex socket drive accepts standard Allen keys and hex drivers
• 7/8 inch length under head suits moderate-depth fastening applications
• 18-8 stainless steel construction resists corrosion in wet or humid environments
• Socket cap head profile allows installation in recessed or countersunk locations

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw for use in any tapped or threaded insert rated for 4-40 UNC fasteners, including OEM equipment panels, control boards, and instrument enclosures requiring this thread specification.

Installation Notes

Installation requires a 3/32 inch hex key or Allen driver. Ensure the mating tapped hole or threaded insert is clean and undamaged before driving the screw. De-energize any electrical equipment before fastening or removing screws on live panels or enclosures. Do not overtighten in thin-gauge or soft-material tapped holes, as 4-40 threads can strip under excessive torque.