Value Collection 015041PR Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 015041PR is a hex socket cap screw designed for secure fastening in precision mechanical assemblies. Sized at 4-40 UNC with a 3/4-inch length under head, this fastener is fully threaded and driven with a 3/32-inch hex key. Constructed from alloy steel with a black oxide coating, it delivers solid tensile strength and basic corrosion resistance in a compact form factor. It meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards, making it appropriate for applications where dimensional and mechanical conformance matters. Machinists, maintenance technicians, and assembly professionals are the primary installers.

This screw is suited for light mechanical assemblies, instrument enclosures, small equipment housings, and precision fixtures where a low-profile socket head is required. The 4-40 UNC thread is a common fine-pitch size used in electronics, instrumentation, and light-duty machine work. The black oxide finish reduces light reflection and provides mild surface protection in dry indoor environments. Fully threaded construction allows engagement along the full length of the fastener, which is useful in thin-material applications.

Key Features

• 4-40 UNC thread size for use in standard tapped holes in light mechanical and electronic assemblies
• 3/4-inch length under head, fully threaded for maximum thread engagement
• 3/32-inch hex drive for use with standard Allen keys or hex drivers
• Alloy steel construction provides higher strength than standard carbon steel fasteners
• Black oxide coating for mild corrosion resistance and reduced surface reflectivity
• Meets ASME/ANSI B18.3, ASTM A574, and IFI 124 fastener standards

Compatibility

Designed as an OEM-style replacement or general-use fastener for any tapped 4-40 UNC threaded hole requiring a hex socket cap screw with a 3/4-inch length under head.

Installation Notes

Installation is performed with a 3/32-inch hex key or Allen driver. Ensure the receiving hole is properly tapped to 4-40 UNC specification before driving the fastener. Do not overtighten, as small-diameter alloy screws can shear at excessive torque. Clean the mating threads before installation to prevent galling or cross-threading.