Value Collection 821742MSC Flange Bolt 1/2-13 Unc Grade 8

Product Description

The VALUE COLLECTION 821742MSC is a smooth flange bolt engineered for high-strength fastening applications requiring a built-in bearing surface. Sized at 1/2-13 UNC with a 1-1/4 inch length under the head and fully threaded along its entire shank, this bolt distributes clamping load across a 1-5/64 inch (1.0781 inch) flange diameter, eliminating the need for a separate washer in most installations. Manufactured from Grade 8 alloy steel to SAE J429 standards, it delivers high tensile strength suitable for demanding mechanical and structural assemblies. The phosphate and oil finish provides baseline corrosion resistance and lubricity during installation.

This flange bolt is suited for use in mechanical equipment assemblies, HVAC mounting brackets, equipment bases, and general structural fastening where a smooth flange bearing surface is required. The UNC thread form is compatible with standard inch-system tapped holes and nuts. Its fully threaded shank allows maximum thread engagement across the full grip length, which is particularly useful in short-stack assemblies where partial threading would reduce holding strength. Trade professionals installing equipment supports, compressor mounts, or structural brackets will find this bolt appropriate for high-load, vibration-prone environments.

Key Features

• Grade 8 alloy steel construction meets SAE J429 for high tensile and proof load strength
• Smooth flange diameter of 1-5/64 inches (1.0781 inches) distributes clamping load without a separate washer
• Fully threaded shank provides maximum thread engagement across the entire 1-1/4 inch length under head
• 1/2-13 UNC thread size fits standard inch-system tapped holes and hex nuts
• Phosphate and oil finish offers corrosion resistance and eases installation torque
• Hex drive for use with standard wrenches and sockets

Compatibility

Designed as an OEM-style replacement or standard-service fastener for any application requiring a 1/2-13 UNC smooth flange bolt with a 1-1/4 inch length under head in Grade 8 alloy steel.

Installation Notes

Installation requires a standard hex wrench or socket sized for a 1/2 inch hex drive fastener. Always de-energize and lock out equipment before servicing any assembly that requires fastener replacement. Torque to the value specified in the equipment manufacturer's service documentation for Grade 8 fasteners at this thread size. Inspect mating threads for damage or contamination before assembly to ensure full thread engagement.