Value Collection 711158MSC Smooth Flange Bolt 1/2-13 Unc

Product Description

The VALUE COLLECTION 711158MSC is a smooth flange bolt designed for structural and mechanical fastening applications requiring a high-strength, self-flanging head design. Built from alloy steel with a material grade rating of 170M PSI, this bolt meets ASTM A574 standards for socket and 12-point drive fasteners. It features a 1/2-13 UNC thread size with partial threading of 1-1/4 inches, a total length under head of 2-1/2 inches, and a smooth flange diameter of 3/4 inches. The uncoated bright finish is suitable for applications where post-installation coatings or controlled assembly environments are used. Installation requires a 1/2-inch 12-point drive tool.

This flange bolt is suited for industrial, mechanical, and structural assembly work where the integrated flange distributes clamping load over a wider surface area without a separate washer. Common applications include equipment mounting, machinery assembly, and heavy-duty fastening in both shop and field environments. The partial thread configuration is preferred when thread engagement needs to be limited to a specific depth within a tapped hole or when a grip section is required through a clearance hole. Trades including millwrights, pipefitters, and general mechanical contractors regularly use ASTM A574 alloy fasteners in demanding load-bearing assemblies.

Key Features

• 1/2-13 UNC thread size with 1-1/4 inches of thread engagement
• 2-1/2 inch length under head for precise grip length control
• Smooth flange diameter of 3/4 inches for integrated load distribution
• 170M PSI alloy steel construction meets ASTM A574 standard
• 12-point drive with 1/2 inch drive size for high-torque tool access
• Bright uncoated finish for use in controlled or post-coated assemblies

Compatibility

Designed as a standard ASTM A574 smooth flange bolt for use in 1/2-13 UNC tapped holes requiring a partially threaded fastener with an integrated flange head.

Installation Notes

Installation should be performed using a 1/2-inch 12-point drive socket with a calibrated torque wrench to achieve proper clamp load per the applicable fastener specification. Ensure the mating tapped hole is clean, undamaged, and thread-gauged before installation. Do not field-modify the thread form or flange geometry. Follow applicable industry torque standards for ASTM A574 alloy steel fasteners of this diameter and grade.