Value Collection 706138MSC Smooth Flange Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION 706138MSC is a partially threaded smooth flange bolt designed for high-strength fastening applications in industrial and mechanical assemblies. Built from alloy steel with a material grade rating of 170M psi, this bolt delivers the tensile strength required in demanding structural and mechanical joints. The 3/8-16 UNC thread size pairs with a 2-inch length under head and a 1-inch threaded section. The integrated smooth flange distributes clamping load over a wider bearing surface, reducing the need for a separate washer. A 12-point drive accepts a 3/8-inch socket for precise torque application in tight access areas.

This bolt is suited for use in manufacturing, machinery assembly, industrial fabrication, and mechanical maintenance applications where a partially threaded, high-strength fastener is required. The smooth flange design is commonly used where bearing surface area matters and where fastener removal and reinstallation are routine. It meets ASTM A574 standards, making it appropriate for high-cycle and load-bearing connections in both OEM and MRO settings.

Key Features

• Partially threaded shaft with 1-inch thread length and 2-inch length under head for precise grip-length control
• 170M psi alloy steel construction meets ASTM A574 standard for high-strength socket head fasteners
• Smooth flange diameter of 0.55 to 0.562 inches provides integrated bearing surface without a separate washer
• 12-point drive with 3/8-inch drive size allows high torque transfer in confined spaces
• Bright uncoated finish suitable for applications where post-treatment or secondary coating will be applied
• 3/8-16 UNC thread form for broad compatibility with standard inch-series tapped holes

Compatibility

Designed as an OEM-style and MRO replacement smooth flange bolt for applications requiring a 3/8-16 UNC, 2-inch length under head, partially threaded fastener conforming to ASTM A574.

Installation Notes

Installation should be performed by a qualified mechanic or industrial technician using a calibrated torque wrench and the appropriate 3/8-inch 12-point socket. Verify that the mating tapped hole is clean, free of debris, and correctly sized for 3/8-16 UNC thread engagement before installation. Do not exceed the rated material strength when applying torque, and follow the fastener manufacturer or equipment OEM torque specifications for the assembly. Bright uncoated fasteners should be inspected for corrosion risk in wet or outdoor environments prior to use.