Value Collection 40270 Hex Socket Cap Screw 5/8-18 Unf

Product Description

The VALUE COLLECTION 40270 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural connections. It features a 5/8-18 UNF thread size with a 2-1/2 inch length under head, providing substantial grip in fine-thread applications where vibration resistance or precise torque control is required. The screw is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces surface reflectivity. The 1/2 inch internal hex drive accepts standard hex keys and socket drivers. Installation is performed by machinists, maintenance technicians, and general industrial trades.

This cap screw is suited for use in precision mechanical assemblies, machine tool fixtures, jigs, hydraulic components, and other applications where a fine-thread fastener with a recessed drive head is required. The partial threading allows the shank to bear shear loads while the threaded portion engages the mating part. It is commonly specified in applications conforming to ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for engineered assemblies where fastener grade and geometry must meet defined specifications.

Key Features

• 5/8-18 UNF fine thread for precise clamp load and vibration resistance
• 2-1/2 inch length under head with partial threading for shear-bearing shank
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• 1/2 inch hex socket drive compatible with standard hex keys and socket drivers
• Meets ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for any application requiring a 5/8-18 UNF alloy steel fastener with a 1/2 inch hex drive and 2-1/2 inch length under head.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 1/2 inch hex key or socket driver. Ensure the mating threaded hole is clean and free of debris before installation. De-energize and lock out all equipment before performing fastener service on machinery or pressurized assemblies. Do not exceed the rated mechanical limits defined for ASTM A574 alloy steel socket cap screws.