Value Collection 721044PR Flat Socket Cap Screw 4-48

Product Description

The VALUE COLLECTION 721044PR is a flat socket cap screw designed for precision fastening applications where a flush or countersunk head profile is required. Sized at 4-48 UNF x 1/2 inch overall length, it is fully threaded and features an alloy steel construction with a black oxide finish. The hex socket drive accepts a 1/16 inch hex key. This fastener meets ASME/ANSI B18.3 and ASTM F835 standards, making it suitable for controlled-tolerance assemblies in mechanical, industrial, and light structural applications. Installation is performed by machinists, maintenance technicians, and assembly professionals working with inch-series fasteners.

This screw is well suited for applications where the fastener head must sit flush with or below the mating surface, such as mounting plates, brackets, hinges, and precision machine components. The 4-48 UNF thread pitch provides fine thread engagement, which improves holding strength in thin materials and allows for more precise torque control. The black oxide finish offers mild corrosion resistance and reduces light reflection in finished assemblies. Sold individually, with a minimum order quantity of 100 pieces.

Key Features

• Flat head profile allows flush or countersunk installation
• Hex socket drive sized at 1/16 inch for standard hex key use
• Fully threaded 4-48 UNF x 1/2 inch overall length
• Alloy steel construction for strength in high-stress fastening
• Black oxide finish provides mild corrosion resistance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an inch-series flat socket cap screw for use in 4-48 UNF tapped holes requiring a countersunk or flush-head fastener.

Installation Notes

Installation requires a 1/16 inch hex key or driver bit rated for socket head cap screws. Ensure the mating hole is properly countersunk to the correct angle before installation to achieve full head seating. Power down or de-energize any equipment before fastening components in electrical or mechanical assemblies. Follow applicable ASME standards for torque and installation procedures.