Minerallac 40340-3 1/2" Zinc-Plated Steel Flat Cut Washer

Minerallac 40340-3 1/2" Zinc-Plated Steel Flat Cut Washer

The Minerallac 40340-3 1/2" Flat Cut Washer, Zinc-Plated Steel is a general-purpose steel fastener washer designed for assembly around a bolt or screw, positioned between the bearing surface of the fastener and the part to which it is attached. Built from steel with a zinc-plated finish for corrosion resistance, this flat cut washer measures 1.375" outside diameter, 0.546" inside diameter, and 0.121" thick, sized to fit 1/2" bolts. Sold in a jar for convenient bulk handling on the job site or in the shop, it's a staple component for electricians, contractors, and maintenance technicians who need reliable hardware for panel assembly, conduit support installation, and general electrical mounting work. Its precise, consistent dimensions make it easy to stock and dispense from a truck, shop bin, or maintenance cart, reducing downtime spent hunting for the right hardware on a job.

Key Features

• Trade Size: Sized to fit 1/2" bolts, matching common electrical and mechanical fastener sizing.
• Durable Construction: Manufactured from steel for strength and long-term durability under load.
• Finish: Zinc-plated coating helps resist corrosion and extends service life in indoor electrical and mechanical applications.
• Dimensions: 1.375" outside diameter, 0.546" inside diameter, and 0.121" thickness for a precise, secure fit around the bolt shank.
• Stress Distribution: Flat washer design improves load distribution across the bearing surface and spans larger clearance holes to prevent damage to the mounted part.
• Application-Ready: Designed for assembly around a bolt or screw, sitting between the fastener head or nut and the mounted material.
• Bulk Packaging: Supplied in a jar for easy dispensing and inventory control in shops, trucks, and maintenance facilities.
• Color: Silver finish for easy visual identification among other hardware sizes.

Technical Specifications

• Outside Diameter: 1.375"
• Thickness: 0.121"
• Fits Bolt Size: 1/2"
• Product Material: Steel
• Product Color: Silver
• Inside Diameter: 0.546"
• Country of Origin: China

Typical Applications

• Electrical Panel and Enclosure Assembly
• Conduit Support and Hardware Mounting
• General Fastener Applications Requiring Load Distribution
• Maintenance and Repair of Electrical Equipment
• New Construction and Renovation Wiring Work

Why Minerallac?

Minerallac supplies steel, zinc-plated hardware built to consistent, precise dimensions for dependable performance in electrical and mechanical assembly work. The durable steel construction and corrosion-resistant zinc finish make this flat cut washer a practical choice for professionals who need reliable, code-appropriate hardware they can count on for everyday installation and maintenance tasks. With exact outside diameter, inside diameter, and thickness specifications, this washer helps ensure a secure, properly seated fastener assembly every time, whether on a service panel, conduit hanger, or general mounting job. Packaged in a jar for convenient bulk dispensing, it's an easy addition to any electrician's truck stock, shop bin, or maintenance inventory, helping reduce time spent searching for the right hardware size on the job. Stocking these washers alongside matching bolts, nuts, and lock washers helps ensure every electrical mounting task is completed with correctly matched, corrosion-resistant hardware, supporting long-term reliability across panelboards, enclosures, conduit hangers, and general equipment mounting throughout commercial and industrial facilities.