Value Collection -40870-1 Button Cap Screw 5/16-24 50pk

Product Description

The VALUE COLLECTION -40870-1 is a fully threaded button socket cap screw designed for secure fastening in tight-clearance applications. It features a 5/16-24 UNF thread and a 1/2-inch length under head, with a low-profile button head that reduces snag points in assembled components. Driven by a 3/16-inch hex socket, the screw is manufactured from alloy steel and finished in black oxide for corrosion resistance. Hardness is rated at 36-43 HRC, making it suitable for medium-to-high-strength fastening tasks. This listing covers a package of 50 screws with a minimum order quantity of 1 package.

Button socket cap screws of this configuration are commonly used in machine assemblies, equipment panels, jigs, fixtures, and fabricated enclosures where a low-profile head is required. The 5/16-24 UNF thread pitch provides fine adjustment and strong clamp load in metal-to-metal applications. This screw is typically installed by machinists, millwrights, maintenance technicians, and fabricators working on light to medium industrial equipment.

Key Features

• 5/16-24 UNF fully threaded, right-hand thread direction
• 1/2-inch length under head for compact fastening depth
• Low-profile button head minimizes protrusion in assembled parts
• 3/16-inch hex socket drive for standard Allen key or hex bit installation
• Alloy steel construction with black oxide finish for corrosion resistance
• Hardness rated 36-43 HRC per ASTM F835 and ANSI/ASME B18.3

Compatibility

Designed as a standard UNF-thread fastener compatible with 5/16-24 tapped holes in metal assemblies, fixtures, and mechanical components per ANSI/ASME B18.3 and ASTM F835 specifications.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 3/16-inch hex key or hex socket bit. Ensure the mating tapped hole is clean and free of debris before driving the screw. Do not exceed the torque rating appropriate for a 5/16-24 alloy steel fastener at the specified hardness grade. Power down or de-energize any equipment before accessing fasteners on live assemblies.