Value Collection 203046B Hex Cap Screw 5/8-11 1-1/2 in 316 Ss

Product Description

The VALUE COLLECTION 203046B is a hex head cap screw sized at 5/8-11 x 1-1/2 inches, manufactured from Grade 316 stainless steel. The 5/8-11 designation refers to a 5/8-inch nominal diameter with 11 threads per inch following the Unified National Coarse (UNC) standard. Grade 316 stainless steel provides strong resistance to corrosion and chloride exposure, making this fastener well suited for demanding service environments. The hex drive measures 15/16 inches across flats. Plumbers, pipefitters, and mechanical contractors commonly use this type of fastener when assembling flanged connections, equipment mounts, and structural supports in corrosive or wet conditions.

This cap screw is appropriate for use in industrial, commercial, and marine-adjacent applications where standard carbon steel fasteners would be vulnerable to rust or chemical attack. It is a common choice when assembling pipe flanges, pump housings, HVAC equipment bases, and similar assemblies exposed to moisture, mild acids, or salt-laden air. The UNC thread form is the most widely used inch-series thread standard in North America, ensuring broad compatibility with standard UNC nuts and tapped holes of the same pitch.

Key Features

• Grade 316 stainless steel construction for superior corrosion and chloride resistance
• 5/8-11 UNC thread form for compatibility with standard inch-series hardware
• 1-1/2 inch length under head for a range of clamping stack-ups
• 15/16 inch hex across flats for use with standard open-end, box, or socket wrenches
• Inch measurement system throughout for direct use with standard American fastener tooling

Compatibility

Designed as an OEM-style replacement or general-use fastener compatible with any standard 5/8-11 UNC tapped hole or nut in inch-series fastener applications.

Installation Notes

Installation is typically performed by plumbers, pipefitters, or mechanical contractors using standard open-end or socket wrenches sized to the 15/16 inch hex. Always de-energize or depressurize the system being worked on before disassembling or reassembling flanged joints or equipment mounts. Apply an appropriate anti-seize compound when installing stainless steel fasteners into stainless or aluminum threads to prevent galling. Follow applicable codes such as ASME B18.2.1 for fastener installation torque guidance based on material and application.