Value Collection 721285BR Flat Socket Cap Screw 5/8-18 X 4 in

Product Description

The VALUE COLLECTION 721285BR is a flat socket cap screw designed for applications requiring a low-profile, flush-mount fastening solution. Manufactured from alloy steel with a black oxide finish, this screw offers solid mechanical strength and modest corrosion resistance in general industrial and mechanical assembly environments. It uses a 3/8-inch hex socket drive and features an 82-degree flat head that seats flush into countersunk holes. The partially threaded shank allows for controlled clamping force. Installed by machinists, millwrights, and maintenance technicians, this fastener is sized at 5/8-18 UNF thread with an overall length of 4 inches.

This fastener is suited for use in precision assemblies, machine components, fixtures, and structural connections where a flush head profile is required. The 5/8-18 UNF thread form makes it appropriate for fine-thread applications where vibration resistance or fine adjustment of clamp load is a priority. The black oxide finish blends into ferrous metal assemblies and provides light surface protection against oxidation in dry or mildly humid environments. It meets ASME/ANSI B18.3 and ASTM F835 standards, making it a recognized choice for controlled manufacturing and MRO applications.

Key Features

• 82-degree flat head with hex socket drive for flush countersunk installation
• 3/8-inch hex socket drive size for standard Allen key or hex bit tools
• 5/8-18 UNF fine thread for improved vibration resistance and clamping precision
• Partially threaded shank for proper grip-length clamping
• Alloy steel construction with black oxide finish for surface protection
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNF flat socket cap screw for use in any application requiring a 5/8-18 threaded, flush-mount fastener conforming to ASME/ANSI B18.3 specifications.

Installation Notes

Installation requires a 3/8-inch hex key or matching hex bit driver. Ensure the mating countersink is machined to 82 degrees to achieve full head seating. Power down or de-energize any equipment before fastener replacement in live assemblies. Follow applicable torque guidelines from ASME or the equipment OEM for alloy steel UNF fasteners of this diameter.