Value Collection 39460 Hex Head Cap Screw 5/8-18 X 5-1/2 in Grade 8

Product Description

The VALUE COLLECTION 39460 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It carries a Grade 8 steel rating, making it suitable for demanding load-bearing joints where shear and tensile strength matter. The 5/8-18 UNF thread form provides a fine-thread engagement suitable for precision applications or installations where vibration resistance is a priority. The zinc yellow dichromate finish offers corrosion resistance in moderate-exposure environments. This screw is installed by millwrights, maintenance technicians, and mechanical contractors working on heavy equipment, machinery, and structural connections.

This fastener is used in industrial maintenance, OEM assembly, and field repair scenarios where a Grade 8, fine-thread cap screw is specified. The partially threaded shank provides a bearing surface in the grip zone, which is important in shear-loaded joint designs. At 5-1/2 inches under the head with a 5/8-18 UNF thread, this screw fits applications requiring longer fastener reach through thicker material stacks. Sold in a package quantity of 25, it is well suited for production assembly lines or stocking in maintenance cribs.

Key Features

• Grade 8 steel construction for high tensile and shear strength in load-bearing joints
• 5/8-18 UNF fine-thread form for improved vibration resistance and precise torque control
• Partially threaded shank provides a smooth bearing surface in the grip zone for shear-loaded applications
• Zinc yellow dichromate finish delivers corrosion resistance in moderate-exposure environments
• Meets ASME B18.2.1 and SAE J429 standards for dimensional and mechanical compliance
• Package quantity of 25 supports production assembly and maintenance stocking requirements

Compatibility

Designed as an OEM-style and aftermarket replacement hex head cap screw for industrial machinery, heavy equipment, and structural assemblies requiring a 5/8-18 UNF Grade 8 fastener with a 5-1/2 inch length under head.

Installation Notes

Installation is performed by qualified mechanical or maintenance technicians. Ensure mating threads are clean and free of debris before installation. De-energize and lock out all equipment per applicable OSHA lockout/tagout procedures before fastener installation or replacement. Do not reuse fasteners that show signs of thread damage, stretching, or corrosion, as Grade 8 fasteners are torque-sensitive and should not be compromised.