Value Collection R52001034 Serrated Flange Bolt 1/4-20

Product Description

The VALUE COLLECTION R52001034 is a serrated flange bolt designed for general fastening applications where vibration resistance and load distribution matter. Sized at 1/4-20 UNC with a 1/2-inch length under head and fully threaded shank, this bolt uses a built-in serrated flange to bite into the mating surface and resist loosening under dynamic loads. The hex drive provides standard wrench or socket access. It is manufactured from Grade 2 AISI C1022 steel with a zinc-plated finish for moderate corrosion protection. Typical installers include mechanical assemblers, HVAC technicians, and maintenance trades working on equipment panels, brackets, and light structural connections.

This bolt is suited for light-duty to medium-duty fastening in residential and commercial equipment assembly. The serrated flange eliminates the need for a separate lock washer by integrating clamping and anti-rotation into a single fastener. Applications include sheet metal enclosures, HVAC equipment panels, electrical junction boxes, and general machinery mounting where a standard 1/4-20 UNC thread pattern is specified. The zinc plating provides a baseline level of corrosion resistance appropriate for indoor and sheltered outdoor installations.

Key Features

• 1/4-20 UNC fully threaded shank with 1/2-inch length under head for shallow fastening applications
• Serrated flange bites into mating surface to resist loosening under vibration without a separate lock washer
• Flange diameter of 0.513 to 0.531 inches distributes clamping load over a wider bearing area
• Hex drive accepts standard wrenches and sockets for fast installation and removal
• Grade 2 AISI C1022 steel construction with zinc-plated finish for general-purpose corrosion resistance

Compatibility

Designed as a general-purpose replacement or maintenance fastener for any application requiring a 1/4-20 UNC serrated flange bolt with a 1/2-inch fully threaded shank.

Installation Notes

Installation is performed by hand-starting the bolt into a tapped or clearance hole, then driving to final torque with a standard hex wrench or socket. Power down or de-energize any equipment before accessing fastener locations on live electrical or HVAC assemblies. Do not reuse serrated flange bolts in critical joints where the serrations have already deformed a mating surface, as clamping effectiveness may be reduced. Follow applicable equipment manufacturer torque specifications; no torque value is specified for this fastener in the available data.