Value Collection 825118MSC Serrated Flange Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION 825118MSC is a serrated flange bolt designed for secure, vibration-resistant fastening in mechanical and structural assemblies. The integrated serrated flange distributes clamp load across a wider bearing surface and bites into the mating material to resist loosening under dynamic loads. This bolt features a 3/8-16 UNC thread, is fully threaded along its 1-1/4 inch length under head, and carries a Grade 5 steel rating for reliable tensile strength in moderate-duty applications. A zinc-plated finish provides basic corrosion resistance. Licensed tradespeople and maintenance technicians working on equipment assemblies, brackets, and panel mounts are the primary installers.

This bolt is suited for residential and light commercial mechanical applications where a standard hex bolt with a separate washer would otherwise be required. The serrated flange eliminates the need for a lock washer in many installations, streamlining assembly on HVAC equipment frames, electrical enclosures, plumbing support brackets, and general sheet-metal assemblies. The 3/8-16 UNC thread is among the most common inch-series coarse thread sizes in North American trade work, making this bolt a frequent go-to for replacement and production fastening tasks.

Key Features

• Serrated flange integrates bearing surface and locking function, eliminating a separate lock washer
• 3/8-16 UNC coarse thread for broad compatibility with standard inch-series tapped holes and nuts
• Fully threaded along the 1-1/4 inch length under head for maximum thread engagement in thin or short-clearance materials
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides baseline corrosion protection for indoor and sheltered applications
• Meets ASME B18.6.3 dimensional standards for hex head bolts and screws

Compatibility

Designed as a standard inch-series serrated flange bolt compatible with any application calling for a 3/8-16 UNC fully threaded hex flange fastener per ASME B18.6.3 and SAE J429 specifications.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for the hex head. De-energize or shut down any equipment before accessing fastener locations on live assemblies. The serrated flange requires a clean, flat mating surface to function correctly — do not install over existing washers or heavily painted surfaces where the serrations cannot engage. Consult applicable mechanical codes and equipment manufacturer torque specifications for final tightening requirements.