Value Collection -33620-1 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION -33620-1 is a hex socket cap screw designed for secure fastening in demanding mechanical and structural applications. Manufactured from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and surface hardness suitable for industrial and trade use. It features a 5/16-18 UNC thread size with a 1-1/4 inch length under head, and is driven with a 1/4 inch hex key. The fully threaded shank provides maximum thread engagement throughout the grip length. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for engineered assemblies where fastener grade matters.

This cap screw is suited for general industrial, mechanical, and equipment assembly applications where a recessed hex drive is required to maintain a low-profile fastener head. It is commonly installed in machine frames, fixtures, jigs, brackets, and similar hardware. Trades including millwrights, pipefitters, HVAC technicians, and equipment service professionals regularly use socket cap screws in both original installation and field repair work. The black oxide finish is particularly useful in applications where light corrosion resistance and reduced light reflection are priorities.

Key Features

• 5/16-18 UNC thread for broad compatibility with standard tapped holes
• 1-1/4 inch length under head with fully threaded shank for maximum engagement
• 1/4 inch hex drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction rated to ASTM A574 for high tensile strength
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Meets ASME/ANSI B18.3 dimensional standards for consistent fitment

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw for use in any tapped hole or pre-drilled assembly conforming to ASME/ANSI B18.3 specifications. Minimum order quantity is 50 pieces.

Installation Notes

Installation requires a 1/4 inch hex key or Allen-head bit driver. Always ensure the receiving thread is clean and properly tapped to 5/16-18 UNC before driving the fastener. Apply thread lubricant or anti-seize compound where dissimilar metals or corrosive environments are present. Follow applicable torque specifications per engineering drawings or fastener manufacturer guidelines for ASTM A574 alloy steel cap screws.