Value Collection 451088BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451088BR is a fully threaded hex head cap screw designed for high-strength bolted connections in demanding industrial and mechanical applications. Manufactured from Grade 8 steel with a bright, uncoated finish, this fastener meets ASME B18.2.1 standards for dimensional accuracy and performance. The 1-1/2-12 UNF (Unified National Fine) thread provides greater tensile strength and better resistance to loosening under vibration compared to coarse-thread equivalents. At 4-1/2 inches in length under head and weighing 3.17 pounds, this is a heavy-duty fastener suited for structural assemblies, heavy equipment, and machinery where rated fastener grade is a specification requirement.

This cap screw is used in a wide range of industrial, agricultural, and construction equipment applications where Grade 8 strength is required. The fine thread pitch makes it well-suited for situations requiring precise torque control and secure clamping force. Typical installations include machine frames, heavy flanged joints, equipment mounting brackets, and other assemblies where the engineer or maintenance tech calls out a Grade 8 UNF fastener. Licensed millwrights, maintenance mechanics, and equipment technicians are the primary installers of fasteners in this class.

Key Features

• Grade 8 steel construction provides high tensile and proof-load strength for critical bolted joints
• Fully threaded along the full 4-1/2-inch shank length for maximum thread engagement
• 1-1/2-12 UNF fine thread for better vibration resistance and precise torque control
• Bright, uncoated finish for use in dry or protected environments
• Conforms to ASME B18.2.1 dimensional standards
• 2-1/4-inch hex key (wrench) size for use with standard heavy-duty wrenching tools

Compatibility

Designed as a standard-dimension Grade 8 hex head cap screw per ASME B18.2.1, compatible with any application specifying a 1-1/2-12 UNF fully threaded fastener in that grade.

Installation Notes

Shut down and de-energize all associated equipment before replacing or installing structural fasteners. Use a calibrated torque wrench and follow the torque specifications provided by the equipment manufacturer or applicable engineering standards for Grade 8 fasteners of this diameter. Inspect the mating threads for damage, corrosion, or contamination before installation. Do not substitute a lower-grade fastener in any application that specifies Grade 8.