Value Collection 451490BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451490BR is a partially threaded hex head cap screw designed for heavy-duty bolted connections in industrial and mechanical assembly applications. It is manufactured from Grade 8 steel with a bright uncoated finish, making it suitable for high-strength fastening where elevated tensile and proof load ratings are required. The screw measures 1-1/8-12 UNF thread size with a 12-inch length under the head and weighs 3.68 pounds. It conforms to ASME B18.2.1 dimensional standards. Machinists, millwrights, and industrial maintenance technicians are the typical installers for fasteners of this class and size.

This cap screw is used in structural and mechanical assemblies that require a fine-thread, high-strength fastener. The 1-1/8-12 UNF thread pitch provides greater thread engagement and resistance to vibration loosening compared to coarse-thread equivalents at the same diameter. The 12-inch body length accommodates thick flanges, plate stacks, or deep through-bolt configurations common in heavy equipment, presses, and industrial machinery. The partial thread design leaves a smooth shank near the head for shear-load applications.

Key Features

• Grade 8 steel construction provides high tensile strength for demanding load-bearing assemblies
• 1-1/8-12 UNF fine thread for increased thread engagement and vibration resistance
• 12-inch length under head suits deep through-bolt and thick-stack configurations
• Partially threaded shank supports shear-load applications where a smooth bearing surface is needed
• Bright uncoated finish — suitable for use with separate plating, coating, or where bare steel is specified
• Conforms to ASME B18.2.1 dimensional standards for reliable interchangeability

Compatibility

Designed as an OEM-style replacement or service fastener for industrial and mechanical assemblies requiring a 1-1/8-12 UNF Grade 8 hex head cap screw per ASME B18.2.1.

Installation Notes

Installation of large-diameter Grade 8 cap screws should be performed by a qualified millwright or industrial mechanic familiar with high-strength fastener procedures. Always torque to the specification required by the equipment manufacturer using a calibrated torque wrench — do not rely on feel or impact tools alone. De-energize and lock out all associated equipment before installing or removing structural fasteners. A 1-11/16-inch hex socket or wrench is required to drive this fastener.