Value Collection 354-0510-01 Flat Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 354-0510-01 is a 5/16-18 x 5/8 inch flat socket cap screw designed for flush or countersunk fastening applications. It features a Torx Plus T40 drive with an 82-degree flat head profile and is fully threaded along its overall length. Manufactured from alloy steel with a black oxide finish, it delivers solid tensile strength and moderate corrosion resistance in dry or lightly oiled environments. This fastener is installed by machinists, millwrights, maintenance technicians, and assembly professionals who require a low-profile screw that sits flush with or below a mating surface. Sold individually, with a minimum order quantity of 100 units.

This screw is suited for use in machine assemblies, fixtures, tooling plates, and structural components where a countersunk seat is required. The 5/16-18 UNC thread size is a standard coarse-thread designation common across industrial and mechanical applications. The black oxide finish blends visually with dark-colored components and reduces surface reflectivity in precision equipment. The Torx Plus drive provides improved torque transfer and reduced cam-out compared to hex socket alternatives, making it a practical choice in high-volume or automated assembly environments.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• Torx Plus T40 drive reduces cam-out and improves torque transfer
• Fully threaded along entire nominal length for maximum thread engagement
• Alloy steel construction provides high tensile strength
• Black oxide finish for reduced reflectivity and light surface protection
• Conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 5/16-18 UNC flat socket cap screw for use in any countersunk application that accepts an ASME/ANSI B18.3 or ASTM F835 compliant fastener of this thread size and head geometry.

Installation Notes

Installation requires a Torx Plus T40 driver or bit; standard Torx T40 bits may fit but are not optimized for Torx Plus sockets. Ensure the mating countersink is machined to an 82-degree included angle to achieve full head seating. Follow applicable torque guidelines for 5/16-18 alloy steel fasteners per job or equipment specifications. Inspect threads and countersunk surfaces for contamination or damage before installation.