Value Collection 451884BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451884BR is a heavy-duty hex head cap screw designed for high-strength bolted assemblies in structural, industrial, and mechanical applications. This fastener features a 2-4-1/2 inch thread size with a 12-inch length under head, partial threading, and a Grade 8 steel construction that delivers the tensile strength required for demanding load-bearing connections. The uncoated bright finish suits applications where a secondary coating or plating will be applied on-site or where bare steel is acceptable. Manufactured to ASME B18.2.1 standards, this screw is a reliable choice for engineers, millwrights, and industrial maintenance technicians working with heavy equipment and structural frames.

This cap screw is suited for large-scale industrial and structural installations where high-torque fastening with heavy fasteners is required. The UNC (Unified National Coarse) thread form is compatible with standard UNC tapped holes and nuts, making it straightforward to source matching hardware. Partial threading allows the unthreaded shank to bear shear loads between mating components, a common requirement in pivot points, clevis joints, and structural connections. The 3-inch hex key drive size accommodates large wrenches and impact equipment typical in industrial maintenance environments.

Key Features

• Grade 8 steel construction for high tensile strength in load-bearing applications
• 2-4-1/2 inch UNC thread size with 12-inch length under head for deep engagement in heavy assemblies
• Partially threaded shank supports shear load transfer between mating components
• Meets ASME B18.2.1 dimensional standards for dimensional consistency and interchangeability
• Bright uncoated finish allows for field-applied coatings or use in bare-steel assemblies
• 3-inch hex drive accommodates heavy wrenches and industrial impact tools

Compatibility

Designed for use with standard UNC tapped holes and Grade 8-rated hex nuts in heavy industrial, structural, and mechanical bolted joint applications.

Installation Notes

Installation should be performed by a qualified millwright, ironworker, or industrial maintenance technician familiar with high-strength fastener torque procedures. Always confirm the tapped hole or nut thread class matches the UNC specification before assembly. Apply appropriate thread lubricant or anti-seize compound per your project specifications, and use a calibrated torque wrench or tensioning tool suited for large-diameter fasteners. Follow applicable standards such as AISC or ASME for structural bolted joint procedures.