Value Collection 451057BR Hex Cap Screw 1-1/2-6 X 3.5in Grade 8

Product Description

The VALUE COLLECTION 451057BR is a fully threaded hex head cap screw sized 1-1/2-6 UNC with a 3-1/2 inch length under head. Manufactured from Grade 8 steel with a bright uncoated finish, this fastener is built for high-strength bolted connections in heavy-duty mechanical and structural assemblies. It conforms to ASME B18.2.1 dimensional standards, making it a dependable choice for applications where fastener geometry and tensile strength are critical. Installation requires a 2-1/4 inch hex key or corresponding wrench. Machinists, millwrights, and maintenance technicians working on industrial equipment and structural steel regularly specify Grade 8 hardware of this size.

This cap screw is suited for industrial, commercial, and heavy equipment applications where high-strength UNC fasteners are required. Typical install scenarios include machinery frames, structural steel connections, agricultural equipment, and similar bolted assemblies that demand Grade 8 tensile and proof load ratings. The fully threaded configuration provides maximum thread engagement across the full grip length, which is advantageous in through-bolt and short-stack applications.

Key Features

• Grade 8 steel construction for high-strength bolted connections
• Fully threaded 1-1/2-6 UNC thread form across the full 3-1/2 inch length under head
• Bright uncoated finish — no coating to account for in torque calculations
• Conforms to ASME B18.2.1 dimensional standards
• 2-1/4 inch hex key size for standard wrenching

Compatibility

Designed as a standard-dimension replacement or new-installation fastener for any assembly specifying a 1-1/2-6 UNC x 3-1/2 inch fully threaded hex head cap screw meeting ASME B18.2.1 and Grade 8 strength requirements.

Installation Notes

Installation is typically performed by millwrights, maintenance mechanics, or structural technicians using a 2-1/4 inch open-end, box-end, or impact wrench. De-energize and lock out all equipment before removing or installing fasteners in mechanical assemblies per applicable OSHA lockout/tagout procedures. Apply fastener torque values per the grade and thread specification called out in the engineering drawing or equipment service manual — do not estimate torque without a reference value. Inspect mating threads for damage or contamination before assembly.