Value Collection -33686-31/2 Hex Socket Cap Screw 5/8-11

Product Description

The VALUE COLLECTION -33686-31/2 is a partially threaded hex socket cap screw designed for high-strength fastening in mechanical and structural assemblies. It features a 5/8-11 UNC thread size and measures 3.5 inches in length under the head. The 1/2 inch hex drive allows for high-torque installation using standard hex keys or socket drivers. Constructed from alloy steel with a black oxide finish, this fastener resists corrosion and maintains surface integrity under demanding conditions. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for precision and load-bearing applications.

This cap screw is appropriate for use in industrial machinery, heavy equipment, tooling fixtures, and general mechanical assemblies where a recessed hex drive is preferred over an external fastener head. The partial threading and coarse 11 TPI pitch provide strong thread engagement in ferrous and non-ferrous tapped holes. Maintenance technicians, machinists, and millwrights commonly install this type of fastener in both shop and field environments.

Key Features

• 5/8-11 UNC coarse thread for strong clamping force in tapped holes
• 3.5 inches length under head with partial threading for accurate clamping
• 1/2 inch hex socket drive for high-torque installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard replacement or stocking fastener for applications requiring a 5/8-11 UNC partially threaded hex socket cap screw per ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists or maintenance technicians using a calibrated hex key or socket driver sized to the 1/2 inch drive. Ensure the receiving tapped hole is clean and free of debris before threading. Do not exceed recommended seating torque for the fastener grade and base material. Apply thread lubricant or anti-seize as required by the assembly specification.