Value Collection -33623-1 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION -33623-1 is a 5/16-18 UNC hex socket cap screw intended for industrial and mechanical fastening applications. The screw measures 2 inches in length under the head and is driven with a 1/4-inch hex key. It is partially threaded and manufactured from alloy steel with a black oxide finish, which provides moderate corrosion resistance and reduces light reflection in service environments. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for structural and mechanical assemblies where reliable clamping load is required.

This screw is used in machine assembly, tooling fixtures, equipment enclosures, and general mechanical fabrication where a recessed drive fastener is preferred. The 5/16-18 UNC thread is a common coarse-thread specification suited for through-hole and threaded-insert applications in steel, aluminum, and similar materials. Partial threading provides a smooth shank section that can function as a shoulder or alignment feature in close-tolerance bores. This fastener is appropriate for both production and maintenance environments.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• 2-inch length under head, partially threaded for shank clearance applications
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish for mild corrosion resistance and reduced reflectivity
• 1/4-inch hex drive for standard hex key or socket installation
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3-compliant fastener in that thread size.

Installation Notes

Installation is performed with a 1/4-inch hex key or T-handle driver; use of a calibrated torque wrench is recommended for structural assemblies. Ensure the mating tapped hole is clean and free of debris before driving. Apply thread lubricant or anti-seize where corrosion or galling is a concern, particularly in aluminum housings. Minimum order quantity for this item is 50 pieces.