Value Collection 451652BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451652BR is a heavy-duty hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assembly work. This fastener features a 1-3/8-6 UNC thread and measures 4-1/2 inches in length under head. Manufactured from Grade 8 steel with a bright, uncoated finish, it meets ASME B18.2.1 dimensional standards. The partially threaded shank provides a strong grip zone ideal for clamping applications where full thread engagement to the head is not required. Machinists, millwrights, and maintenance technicians are the typical installers for this class of fastener.

This hex head cap screw is suited for heavy industrial machinery assembly, structural steel connections, and high-load mechanical joints where Grade 8 tensile strength is specified. The 1-3/8-6 UNC coarse thread is a common specification in inch-based mechanical assemblies across manufacturing, agricultural equipment, and heavy equipment repair. The bright uncoated finish is appropriate for indoor or protected environments where corrosion resistance is not the primary requirement. A 2-1/16 inch hex key size is used for installation with a standard hex wrench or socket.

Key Features

• Grade 8 steel construction for high tensile and shear strength in demanding applications
• 1-3/8-6 UNC coarse thread for reliable engagement in inch-system assemblies
• 4-1/2 inch length under head accommodates thick clamping stacks
• Partially threaded shank provides a clean clamping surface between joined components
• Meets ASME B18.2.1 dimensional standard for consistent fitment
• Bright uncoated finish maintains close dimensional tolerances on thread form

Compatibility

Designed as a standard inch-series hex head cap screw compatible with any 1-3/8-6 UNC tapped hole or nut in Grade 8 or lower-grade applications per ASME B18.2.1.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance personnel using a 2-1/16 inch hex socket or wrench. Always de-energize and lockout machinery before replacing or tightening structural fasteners. Do not exceed the rated torque for Grade 8 fasteners at this diameter as specified by applicable engineering standards or equipment service documentation. Inspect threads on both the fastener and the mating part for damage before assembly.