Value Collection 451133BR Hex Head Cap Screw 5/8-18 X 8 in Grade 8

Product Description

The VALUE COLLECTION 451133BR is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured to ASME B18.2.1 standards, this fastener is produced from Grade 8 steel with a bright, uncoated finish. It measures 8 inches in length under the head and uses a 5/8-18 UNF thread, making it suitable for applications requiring fine-thread engagement and superior tensile strength. A 5/16-inch hex key drive accommodates standard installation tooling. This fastener is typically installed by maintenance technicians, pipefitters, millwrights, or mechanical contractors working on equipment assemblies, flanged connections, or structural joint applications.

This cap screw is suited for use in industrial machinery, equipment mounting, and structural fastening scenarios where Grade 8 strength and fine-thread UNF profiles are required. The partial threading allows for greater shank grip strength in thick-material joints and through-bolt applications. The uncoated bright finish is appropriate for dry or controlled environments where corrosion resistance is not the primary concern. It is sold individually and is packaged as a single unit per order.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-18 UNF fine-thread profile for precise thread engagement
• 8-inch length under head for deep-reach fastening applications
• Partially threaded shank provides increased grip strength in thick-material joints
• Meets ASME B18.2.1 dimensional standards for consistent fitment
• Bright, uncoated finish suitable for controlled-environment installations

Compatibility

Designed as an OEM-style replacement or direct-use fastener for industrial and mechanical assemblies requiring a 5/8-18 UNF, 8-inch partially threaded hex head cap screw conforming to ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with torque requirements for Grade 8 fasteners. Always consult the equipment manufacturer's torque specifications before final tightening. Ensure mating threads are clean and free of debris before installation. A properly calibrated torque wrench is recommended to avoid over-tightening and potential thread or fastener damage.