Value Collection R57001258 Hex Head Cap Screw 1/2-20 X 6 in

Product Description

The VALUE COLLECTION R57001258 is a partially threaded hex head cap screw sized 1/2-20 x 6 inches, manufactured from 18-8 stainless steel with no coating applied. It features a unified fine thread (UNF) pattern and is measured under the head at 6 inches in length. The 1/2-20 designation indicates a half-inch nominal diameter with 20 threads per inch, placing it in the finer thread series preferred for applications requiring precise clamping force and vibration resistance. Weighing approximately 0.4 pounds, this fastener is suited for mechanical assembly, structural connections, and equipment fabrication where corrosion resistance is a priority. Installation is performed by mechanics, millwrights, pipefitters, and general tradespeople.

This cap screw is used in a wide range of industrial, commercial, and trade applications where stainless steel fasteners are required. The 18-8 alloy grade provides solid resistance to corrosion and oxidation, making it a practical choice for wet environments, HVAC equipment frames, pump assemblies, plumbing fixture mounts, and food-grade or marine-adjacent installations. The partial threading along the shank allows for a smooth grip zone, which is useful when precise bearing surface contact between clamped parts is needed.

Key Features

• 1/2-20 UNF thread pattern for fine-pitch clamping control
• 6-inch length measured under the head
• 18-8 stainless steel construction for corrosion resistance
• Partially threaded shank provides a smooth grip zone
• Uncoated finish — no added plating or treatment
• Hex head drive accepts standard hex wrenches and sockets

Compatibility

Designed as a standard inch-series UNF hex head cap screw for use in any application requiring a 1/2-20 x 6-inch partially threaded fastener in 18-8 stainless steel.

Installation Notes

Installation is performed using a standard hex socket or open-end wrench sized to the 1/2-inch fastener head. Power down and de-energize any equipment before fastener work on electrical enclosures or mechanical assemblies. Follow applicable torque guidelines from the equipment manufacturer or relevant codes such as ASME or AISC for structural fastener applications. Do not mix stainless steel fasteners with dissimilar metals in environments that promote galvanic corrosion without appropriate isolation measures.