Value Collection 451600BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451600BR is a heavy-duty hex head cap screw designed for high-strength fastening in industrial and mechanical assemblies. Manufactured from Grade 8 steel with a bright, uncoated finish, this fastener features a 1-1/4-12 UNF thread size and measures 11 inches under the head. It is partially threaded, conforming to ASME B18.2.1 dimensional standards. The 1-7/8-inch hex key size allows for installation with standard heavy-duty wrenches. Weighing 4.29 pounds, this screw is suited for demanding structural and equipment-mounting applications where high tensile strength is required.

This fastener is appropriate for use in heavy equipment fabrication, industrial machinery assembly, structural steel connections, and other applications that demand Grade 8 tensile performance. The UNF thread form provides finer thread engagement, which improves clamping force and resistance to loosening under vibration. The partial threading is standard for longer-length cap screws of this diameter and length combination, keeping the unthreaded shank in the shear zone of the joint.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 1-1/4-12 UNF thread — fine thread for improved clamping and vibration resistance
• 11-inch length under head with partial threading per standard practice for this size
• Bright, uncoated finish — no plating or coating added
• Conforms to ASME B18.2.1 dimensional standards
• 1-7/8-inch hex drive size for use with standard heavy-duty wrenches or sockets

Compatibility

Designed as a standard ASME B18.2.1 hex head cap screw for use in any application requiring a 1-1/4-12 UNF partially threaded fastener in Grade 8 steel.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with high-strength fastener torque procedures. Always consult the appropriate engineering specification or fastener torque table for Grade 8 fasteners at this diameter before final tightening. Use a calibrated torque wrench and ensure mating threads are clean and free of debris before assembly. Do not apply lubricants or thread compounds unless specified by the joint design engineer, as this will alter the torque-to-clamp-load relationship.