Value Collection -33627-2 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION -33627-2 is a hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. Built from alloy steel with a black oxide finish, this screw delivers reliable clamping force and corrosion resistance in demanding environments. It features a 5/16-18 UNC thread size, a 3-1/4 inch length under head, and a 1/4 inch hex drive. Partial threading along the shank provides a strong grip in tapped holes and maintains accurate alignment in precision assemblies. Manufactured to ASME/ANSI B18.3 and ASTM A574 standards.

This cap screw is suited for use in machine assembly, equipment maintenance, and fabrication work where a recessed hex drive is required for tight-clearance installations. The 5/16-18 UNC thread is a common fastener size found in a wide range of industrial and mechanical equipment. Typical installers include machinists, maintenance technicians, pipefitters, and general tradespeople working on metal assemblies. The black oxide finish reduces light reflection and provides mild corrosion protection in low-moisture environments.

Key Features

• 5/16-18 UNC thread size for broad compatibility with standard tapped holes
• 3-1/4 inch length under head accommodates thicker stack-up assemblies
• 1/4 inch hex socket drive allows use in confined or recessed spaces
• Partially threaded shank improves shear strength and positional accuracy
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide coating provides mild corrosion resistance and low-glare finish

Compatibility

Designed as a standard replacement or stock fastener for any application requiring a 5/16-18 UNC hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed using a 1/4 inch hex key or Allen driver. Ensure the mating tapped hole is clean, free of debris, and cut to the correct 5/16-18 UNC thread specification before driving the screw. Apply thread lubricant or thread-locking compound as required by the assembly specification. Do not exceed the rated mechanical properties of the fastener by over-torquing.