Value Collection MP39453 Hex Cap Screw 5/8-18 X 3 in Grade 8

Product Description

The VALUE COLLECTION MP39453 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers substantial tensile strength and corrosion resistance suitable for demanding environments. The screw measures 5/8-18 thread size with a 3-inch length under the head, conforming to Unified National Fine (UNF) thread standards. Compliance with ASME B18.2.1 ensures dimensional accuracy and interchangeability across standard tooling and assembly specifications. Machinists, maintenance technicians, and mechanical contractors rely on this fastener for critical bolted joints.

This hex head cap screw is appropriate for use in heavy equipment assembly, automotive drivetrain components, hydraulic systems, and structural mechanical connections where fine-thread engagement and Grade 8 strength ratings are required. The partial threading provides a smooth shank section, which is advantageous in applications requiring precise shear load distribution or close-tolerance through-hole fits. Sold in a package quantity of 10, this screw is suited for shop stock and field service kits alike.

Key Features

• Grade 8 steel construction for high tensile and proof load capacity
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• 5/8-18 UNF thread for fine-pitch engagement and vibration resistance
• Partially threaded shank for shear load applications and close-tolerance fits
• Conforms to ASME B18.2.1 dimensional standards
• Sold in a package of 10 for convenient shop or field stocking

Compatibility

Designed as a standard-dimension replacement or service fastener for any application requiring a 5/8-18 UNF partially threaded hex head cap screw meeting ASME B18.2.1 and Grade 8 material specifications.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with proper fastener torque procedures for Grade 8 hardware. Always use a calibrated torque wrench and consult the equipment manufacturer's torque specification for the specific joint being assembled. Ensure mating threads are clean, free of damage, and lubricated or dry as specified by the application before driving. Do not substitute a lower-grade fastener in any joint originally specified for Grade 8 hardware.