Value Collection R57001009 Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION R57001009 is a hex socket cap screw designed for precision fastening applications where a low-profile, high-strength connection is required. Threaded 4-40 UNC with a 3/32-inch hex drive and a 1-1/8-inch length under head, this screw is machined from 18-8 stainless steel with a bright, uncoated finish. The 18-8 alloy provides solid corrosion resistance without plating, making it suitable for environments where contamination from coatings is a concern. It is installed using a hex key or Allen driver and is a common fastener choice for mechanical assemblies, instrumentation panels, and light structural connections handled by machinists, millwrights, and maintenance technicians.

This screw is suited for residential and commercial applications where fine-threaded, small-diameter fasteners are required. Typical use cases include precision equipment assembly, electronic enclosures, control panel mounting, and general-purpose machine work. The 4-40 UNC thread specification makes it a standard choice in instrumentation and light mechanical work where controlled clamp load in a small form factor is needed. Minimum order quantity is 100 pieces, making it appropriate for shop stock, MRO inventory, and production line supply.

Key Features

• 4-40 UNC thread for precise engagement in fine-threaded applications
• 3/32-inch hex drive accepts standard Allen or hex key tools
• 1-1/8-inch length under head suits medium-depth through-hole and tapped-hole installations
• 18-8 stainless steel construction provides corrosion resistance without a coating
• Bright, uncoated finish eliminates plating thickness variation for tight-tolerance fits
• Sold in multiples of 100 for shop stock and production use

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for tapped holes and threaded inserts conforming to 4-40 UNC specifications in mechanical, electrical, and instrumentation assemblies.

Installation Notes

Installation requires a 3/32-inch hex key or Allen driver. Ensure the mating threaded hole or insert is clean and free of debris before driving. Apply appropriate thread preload per assembly requirements and do not overtighten, as small-diameter stainless fasteners are susceptible to galling. A licensed or qualified mechanic or maintenance technician should verify thread engagement depth before final assembly.