Value Collection HCI51250450G Hex Head Cap Screw Grade 5

Product Description

The VALUE COLLECTION HCI51250450G is a partially threaded hex head cap screw engineered for structural and mechanical fastening applications. It is sized at 1-1/4-7 UNC with a 4-1/2-inch length under head, manufactured from Grade 5 steel with a hot-dipped galvanized finish for corrosion resistance. The coarse UNC thread pattern and hex drive head make it suitable for high-load connections where reliable clamping force is required. Licensed tradespeople working in construction, HVAC equipment mounting, plumbing infrastructure, and industrial assemblies rely on this fastener class for dependable joint integrity in demanding environments.

This cap screw is suited for heavy-duty bolted connections in both indoor and outdoor settings where moisture or atmospheric exposure is a concern. The hot-dipped galvanized coating provides a thick zinc layer that resists rust and oxidation, making it a practical choice for exterior structural steel, utility brackets, equipment bases, and mechanical assemblies subject to wet or corrosive conditions. Its partially threaded shank allows for a bearing surface that resists shear loads in bolted joint applications.

Key Features

• Grade 5 steel construction for elevated tensile and proof load ratings compared to Grade 2 fasteners
• Hot-dipped galvanized finish provides thick zinc coating for corrosion and moisture resistance
• 1-1/4-7 UNC coarse thread standard ensures broad nut and tapped-hole compatibility
• Partially threaded shank provides shear resistance and a firm bearing surface in bolted joints
• 4-1/2-inch length under head accommodates thicker material stacks and structural connections
• Hex head drive accepts standard hex wrenches and impact sockets for installation with common tools

Compatibility

Designed for use with standard 1-1/4-7 UNC hex nuts, flat washers, and lock washers conforming to inch-series fastener standards. Suitable as a replacement or service fastener wherever a Grade 5 or equivalent hot-dipped galvanized hex cap screw of this thread and length is specified.

Installation Notes

Installation should be performed by qualified tradespeople following applicable structural or mechanical codes. Use a calibrated torque wrench or impact driver with the appropriate socket size to achieve proper clamping force without overloading the fastener. Verify that mating nuts and tapped holes are clean, undamaged, and rated for 1-1/4-7 UNC thread engagement before assembly. Do not mix galvanized fasteners with incompatible metals in applications where galvanic corrosion is a concern.