Value Collection 3728MWW Serrated Flange Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION 3728MWW is a serrated flange bolt designed for general fastening applications where a built-in bearing surface and anti-loosening grip are required. Sized at 3/8-16 UNC with a 1-3/4 inch length under head, this bolt is fully threaded from tip to flange face. It is manufactured from AISI C1022 Grade 2 steel and finished with a zinc plating for basic corrosion resistance. The integrated serrated flange eliminates the need for a separate lock washer by biting into the mating surface as the fastener is driven, providing resistance to vibration-induced loosening. Installers in HVAC, plumbing, electrical, and mechanical trades reach for this style of bolt when assembling panels, brackets, and equipment frames.

This serrated flange bolt is suited for light-duty to medium-duty structural and mechanical assembly in both residential and commercial applications. Common install scenarios include securing equipment mounting brackets, sheet metal frames, junction boxes, and support structures where a hex-drive fastener with a self-locking flange face provides assembly efficiency. The fully threaded shank allows maximum thread engagement across the full grip length, making it practical when clamping thin materials or when threading into short blind holes.

Key Features

• 3/8-16 UNC thread size with 1-3/4 inch fully threaded shank for full grip engagement
• Integrated serrated flange diameter of 0.771 to 0.793 inches distributes load and resists loosening without a separate washer
• Grade 2 AISI C1022 steel construction provides adequate tensile strength for general mechanical assembly
• Zinc-plated finish offers baseline corrosion protection in dry indoor environments
• Hex drive compatible with standard hex sockets and wrenches for fast installation
• Fully threaded design maximizes thread contact when fastening thin stock or short-depth tapped holes

Compatibility

Designed as a standard 3/8-16 UNC serrated flange bolt suitable for use in any application calling for a Grade 2 fully threaded hex flange fastener in the inch measurement system.

Installation Notes

Installation is performed using a standard hex socket or open-end wrench sized for a 3/8-inch hex drive fastener. Ensure the mating surface is clean and free of debris so the serrated flange can seat properly and engage its anti-loosening feature. Do not use an additional lock washer under the flange, as this will prevent the serrations from contacting the work surface. Follow applicable torque guidelines from the equipment manufacturer or relevant mechanical codes when torque values are specified for the assembly.