Value Collection R88448882 Hex Head Cap Screw 5/8-11 X 20 in

Product Description

The VALUE COLLECTION R88448882 is a partially threaded hex head cap screw sized 5/8-11 x 20 inches, manufactured from 18-8 stainless steel with an uncoated finish. The 5/8-11 designation indicates a 5/8-inch nominal diameter with 11 threads per inch following the Unified National Coarse (UNC) standard. At 20 inches in length under the head, this fastener is suited for heavy-duty structural or mechanical assemblies where extended grip length and corrosion resistance are required. The 18-8 stainless steel construction provides solid resistance to rust and oxidation without the need for a protective coating. Partial threading allows for greater shank bearing area in bolted joints, reducing shear stress at the interface.

This fastener is used across a wide range of industrial, mechanical, and structural applications where a long-length, corrosion-resistant cap screw is needed. Typical install scenarios include equipment mounting, fabrication, HVAC structural framing, plumbing support structures, and general mechanical assembly. The UNC thread standard makes it compatible with standard inch-series nuts and tapped holes. It is sold individually with a minimum order quantity of one.

Key Features

• 18-8 stainless steel construction for corrosion resistance without a coating
• Partially threaded shank reduces shear stress at bolted joint interfaces
• 5/8-11 UNC thread for compatibility with standard inch-series hardware
• 20-inch length under head accommodates deep grip or long-reach assemblies
• Uncoated finish — no plating or treatment that can flake or degrade over time

Compatibility

Designed for use with standard 5/8-11 UNC inch-series hex nuts, flat washers, and tapped holes in industrial and mechanical applications requiring 18-8 stainless steel fasteners.

Installation Notes

Installation is typically performed by millwrights, pipefitters, HVAC technicians, or general mechanical tradespeople. Use a properly sized hex wrench or socket to drive the fastener; avoid adjustable tools that may round the head. Ensure mating threads and tapped holes are clean and free of debris before assembly. Do not mix stainless steel fasteners with dissimilar metals in environments where galvanic corrosion is a concern.