Value Collection 721273BR Flat Socket Cap Screw 5/8-18

Product Description

The VALUE COLLECTION 721273BR is a flat socket cap screw designed for countersunk fastening applications in metal assemblies and mechanical components. It features an 82-degree flat head with a 3/8-inch hex socket drive, allowing flush or below-surface installation. The screw measures 5/8-18 (UNF) thread by 1 inch overall length and is fully threaded. Constructed from alloy steel with a black oxide finish, it provides good corrosion resistance and is suitable for use in machinery, tooling fixtures, and structural assemblies where a low-profile fastened joint is required. This fastener is installed by machinists, millwrights, and maintenance technicians.

This flat socket cap screw is used in applications requiring a flush or recessed fastener head, such as machine tool assemblies, jigs, fixtures, and precision mechanical components. The UNF (Unified National Fine) thread pitch of 5/8-18 provides strong thread engagement and is preferred in applications where fine adjustment or higher clamping force is needed compared to coarse thread alternatives. The black oxide finish reduces light reflection and offers mild corrosion protection in controlled environments.

Key Features

• 82-degree flat head profile for flush or countersunk installation
• 3/8-inch hex socket drive for precise torque application with standard Allen keys
• 5/8-18 UNF fully threaded for maximum thread engagement along the full 1-inch length
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish for mild corrosion resistance and reduced surface reflection

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for applications requiring a 5/8-18 UNF flat socket cap screw per ASME/ANSI B18.3 and ASTM F835 specifications.

Installation Notes

Install using a 3/8-inch hex key or Allen socket driver. Ensure the mating countersink is machined to an 82-degree angle to achieve proper head seating and clamping load. Always de-energize or lock out equipment before replacing fasteners on powered machinery. Torque to values specified by the equipment manufacturer or applicable engineering standards for the fastener grade and joint material.