Value Collection R40664460 Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION R40664460 is a hex socket cap screw sized 4-40 UNC with a 5/8-inch length under head and a 3/32-inch internal hex drive. Manufactured from 18-8 stainless steel, this fastener offers solid corrosion resistance for general-purpose and light industrial applications. The socket cap head style allows installation in tight clearances where a standard hex bolt head would not fit. Machinists, assembly technicians, and maintenance professionals use this screw when a clean, low-profile fastener with reliable thread engagement is required. Its 4-40 UNC thread form is a common fine-pitch unified coarse designation frequently found in instrument panels, brackets, and light mechanical assemblies.

This screw is suited for use in panel assembly, instrument enclosures, electronic chassis, and light structural brackets where stainless steel is specified for corrosion resistance or sanitary requirements. The 4-40 UNC thread is widely used in small-format mechanical and electrical assemblies found in both commercial and residential equipment. Installation is straightforward with a standard 3/32-inch hex key or Allen driver. This part is sold individually but carries a minimum order quantity of 100 units, making it appropriate for shop stock, maintenance kits, or production line inventory.

Key Features

• 4-40 UNC thread for precise engagement in small-format assemblies
• 5/8-inch length under head suits moderate-depth fastening applications
• 3/32-inch internal hex drive accepts standard Allen keys and hex drivers
• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Socket cap head profile allows use in recessed or clearance-limited spaces

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for use in instrument panels, electronic enclosures, light mechanical assemblies, and any application calling for an 18-8 stainless steel socket cap fastener with a 5/8-inch under-head length.

Installation Notes

Installation requires a 3/32-inch hex key or Allen-style driver. Ensure the mating threaded hole or nut is clean and properly tapped to 4-40 UNC specification before driving. Avoid cross-threading by starting the screw by hand before applying torque. When used in stainless-to-stainless assemblies, apply an anti-galling compound to the threads to prevent seizing during tightening.