Value Collection 451031BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451031BR is a hex head cap screw sized 1-1/4-7 UNC by 4-1/2 inches under the head. It is manufactured from Grade 8 steel with a bright, uncoated finish. The screw is partially threaded and conforms to ASME B18.2.1 dimensional standards. Weighing 2.08 pounds, this fastener is suited for high-strength bolted connections in structural, industrial, and heavy-duty mechanical assemblies. A licensed tradesperson or maintenance mechanic typically installs this fastener using a 1-11/16 inch hex key or the corresponding wrench size.

This cap screw is used in applications requiring a high-strength inch-series fastener with a coarse UNC thread form. It is appropriate for structural steel connections, heavy equipment, and industrial machinery where Grade 8 tensile strength is specified. The partially threaded shank allows the unthreaded portion to bear shear loads without thread engagement in the grip zone, which is a common design requirement in mechanical and structural joints.

Key Features

• Grade 8 steel construction for high clamping force and tensile strength
• 1-1/4-7 UNC coarse thread for reliable engagement in steel and heavy-duty applications
• Partially threaded shank to distribute shear loads across the grip length
• Bright, uncoated finish for applications where coating is not required or specified
• Conforms to ASME B18.2.1 dimensional standard
• 1-11/16 inch hex key size for standard wrenching

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 1-1/4-7 UNC Grade 8 partially threaded fastener meeting ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with high-strength fastener torque requirements per applicable engineering specifications. Always consult the assembly or structural drawing for required torque values before tightening. Do not substitute a lower-grade fastener in a Grade 8 application. Inspect mating threads for damage or contamination before installation.