Value Collection 204218C Hex Head Cap Screw 3/8-16

Product Description

The VALUE COLLECTION 204218C is a hex head cap screw manufactured from Grade 316 stainless steel. It features a 3/8-16 UNC thread and measures 1-1/2 inches under the head, making it a standard inch-system fastener suited for applications where corrosion resistance is critical. The 9/16-inch hex drive accepts standard sockets or wrenches. Grade 316 stainless steel offers enhanced resistance to chlorides and marine environments compared to Grade 304, making this screw a reliable choice in demanding service conditions. Plumbers, pipefitters, marine technicians, and industrial maintenance professionals commonly install this fastener.

This hex head cap screw is appropriate for use in wet, corrosive, or saltwater-adjacent environments where standard carbon steel fasteners would be prone to rust or chemical attack. Typical installations include pipe flange assemblies, pump housings, equipment mounting in mechanical rooms, and outdoor or marine structural connections. The UNC thread form is compatible with standard tapped holes and hex nuts of the same thread specification.

Key Features

• Grade 316 stainless steel construction for superior corrosion and chloride resistance
• 3/8-16 UNC thread for compatibility with standard inch-system hardware
• 1-1/2 inch length under head for typical flange and structural fastening depths
• 9/16-inch hex drive accepts standard sockets and combination wrenches
• Inch system of measurement — direct replacement for imperial-spec fastener applications

Compatibility

Designed as a standard 3/8-16 UNC hex head cap screw for use in any application requiring Grade 316 stainless steel fasteners in the inch measurement system.

Installation Notes

Installation is performed by qualified tradespeople using standard hand tools or power drivers fitted with the appropriate 9/16-inch socket. Ensure mating threads are clean and free of debris before installation. Follow applicable torque guidelines from the equipment manufacturer or relevant code standards such as ASME for pressure-boundary applications. Do not mix stainless steel fasteners with dissimilar metals in assemblies where galvanic corrosion could be a concern.