Value Collection 208785 Hex Head Cap Screw 1/2-13x3 18-8 Ss

Product Description

The VALUE COLLECTION 208785 is a 1/2-13 x 3 inch hex head cap screw manufactured from 18-8 stainless steel. The 1/2-13 designation indicates a 1/2-inch nominal diameter with 13 threads per inch on a Unified National Coarse (UNC) thread form. The 3-inch dimension refers to the length under the head. With a 3/4-inch hex drive, this fastener is installed using a standard hex wrench or socket. Machinists, pipefitters, millwrights, and general maintenance technicians use this screw where corrosion resistance and moderate tensile strength are required in structural and mechanical assemblies.

This fastener suits applications in wet, outdoor, or corrosive environments where carbon steel would be prone to rust. Typical use cases include equipment mounting, pipe flange connections, enclosure assembly, and general mechanical fabrication in light industrial or commercial settings. The 18-8 stainless steel grade offers good resistance to a wide range of chemicals and is non-magnetic in its annealed state, making it a practical choice for food service, marine-adjacent, and HVAC equipment installations.

Key Features

• 1/2-13 UNC thread form for broad compatibility with standard inch-system tapped holes and hex nuts
• 3-inch length under head provides substantial grip length for thick material stacks or flanged connections
• 18-8 stainless steel construction resists rust and corrosion in wet and outdoor environments
• 3/4-inch hex head drives with common wrenches and sockets — no specialty tooling required
• Inch measurement system throughout for direct fit with standard UNC hardware

Compatibility

Designed for use in any application requiring a 1/2-13 UNC hex head cap screw with a 3-inch length under head. Mates with standard 1/2-13 hex nuts, coupling nuts, and tapped holes conforming to UNC inch-system thread standards.

Installation Notes

Installation should be performed by a qualified mechanic, pipefitter, or maintenance technician familiar with fastener torque requirements for the specific joint material and load. Always verify that the mating thread is clean and free of debris before driving the fastener. Do not mix stainless steel fasteners with dissimilar metals in environments where galvanic corrosion is a concern. Apply an appropriate anti-seize compound when the fastener will be exposed to high heat or prolonged moisture to prevent galling of the stainless threads.