Value Collection 821776MSC Flange Bolt 1/2-13 Unc 3in Grade 8

Product Description

The VALUE COLLECTION 821776MSC is a smooth flange bolt designed for heavy-duty fastening applications where a built-in bearing surface is required. Sized at 1/2-13 UNC with a 3-inch length under head, this bolt is partially threaded with 1.25 inches of thread engagement. The flange diameter measures 1.0781 inches (1-5/64 inches), distributing clamp load over a wider surface area without requiring a separate washer. Manufactured from Grade 8 alloy steel with a phosphate and oil finish, it meets SAE J429 standards for mechanical and chemical properties. Hex drive allows installation with standard wrenches or sockets. This fastener is suited for structural and mechanical assembly work in industrial, agricultural, and equipment manufacturing environments.

This bolt is used in applications where a smooth, non-serrated flange is needed to avoid marking or rotating against finished or coated surfaces. Typical installations include heavy equipment frames, agricultural machinery, hydraulic component mounting, and structural steel assemblies. The Grade 8 alloy steel construction makes it appropriate for high-stress joints requiring elevated tensile and proof load strength. The phosphate and oil finish provides moderate corrosion resistance and helps with initial installation torque control. Sold individually with a minimum order quantity of 50 units per order.

Key Features

• 1/2-13 UNC thread size with 1.25 inches of partial threading
• 3-inch length under head for deeper grip in thick assemblies
• Smooth flange diameter of 1.0781 inches acts as an integrated bearing surface
• Grade 8 alloy steel construction meets SAE J429 mechanical requirements
• Phosphate and oil finish for moderate corrosion resistance and reduced galling
• Hex drive compatible with standard 3/4-inch wrenches and sockets

Compatibility

Designed as an inch-series UNC fastener suitable for use in any application requiring a 1/2-13 partially threaded smooth flange bolt with Grade 8 alloy steel strength and SAE J429 compliance.

Installation Notes

Installation is performed by mechanical assembly technicians, millwrights, or maintenance personnel using standard hand or power tools with a 3/4-inch hex drive. Always de-energize or lock out equipment before servicing fastened assemblies. Apply consistent torque using a calibrated torque wrench and follow the assembly engineer's specified torque values for the joint design. Do not reuse fasteners that show signs of thread damage, corrosion, or deformation.