Value Collection 872037PR Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 872037PR is a hex socket cap screw designed for precision fastening in mechanical assemblies, machine components, and structural applications. Threaded 4-40 UNC with a 1/2-inch length under head, this fastener is fully threaded from tip to head. Drive engagement is via a 3/32-inch internal hex socket, requiring an Allen key or hex driver. The alloy steel construction provides high tensile strength, and the zinc-plated finish adds a layer of corrosion resistance for general indoor and light-duty service environments. This screw meets ASME B18.8 and ASTM A574 standards, confirming it is manufactured and tested to recognized fastener specifications. Machinists, millwrights, and assembly technicians are the typical end users.

This fastener suits fine-threaded applications where a 4-40 UNC thread pitch is specified. Common install scenarios include light machine frames, instrument enclosures, electronic chassis, and small mechanical assemblies where a flush or recessed head profile is required. Its compact drive size and full thread engagement make it suitable for thin-material tapping as well as threaded-insert applications. Sold individually, with a minimum order quantity of 100 pieces.

Key Features

• 4-40 UNC thread size for fine-pitch fastening in light mechanical assemblies
• Fully threaded shank for maximum thread engagement along the entire 1/2-inch length under head
• 3/32-inch hex socket drive for use with standard Allen or hex key drivers
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Zinc-plated finish provides baseline corrosion resistance for general service
• Conforms to ASME B18.8 fastener standard

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw for use in any application requiring ASME B18.8-compliant socket head cap fasteners with a 1/2-inch length under head.

Installation Notes

Installation requires a 3/32-inch hex key or Allen driver; use of an incorrect driver size risks stripping the socket recess. Ensure mating threads are clean and free of debris before installation. Apply thread-locking compound only if specified by the equipment manufacturer, as improper use can affect torque characteristics. Fastener service in corrosive or high-humidity environments may require additional protective coatings beyond the factory zinc plate.