Nord-Lock 1240 Wedge Locking Washer – Carbon Steel – Zinc Flake Coated – 3/8″ – Pkg of 200

Description

Product Overview

The Nord-Lock 1240 wedge locking washer is engineered to deliver superior lock performance in demanding industrial applications. Constructed from high‑grade carbon steel, each washer receives a zinc‑flake coating that provides long‑lasting corrosion resistance even in harsh, moisture‑laden environments. The precise 3/8‑inch diameter is calibrated to match standard bolt and screw sizes, ensuring a seamless fit that eliminates the need for additional adapters or modifications.

Designed with a patented wedge mechanism, the washer creates a self‑tightening action that resists loosening caused by vibration, shock, and thermal cycling. This mechanical advantage translates into reduced maintenance intervals and lower total cost of ownership for facilities that rely on heavy machinery, conveyors, and structural assemblies. The product dimensions of 2 × 2 × 3 inches and a weight of approximately one pound per unit make handling and inventory management straightforward.

Each package contains 200 units, providing ample supply for large‑scale projects, bulk orders, or ongoing maintenance programs. The packaging is optimized for protection during transit, featuring sturdy cardboard boxes with internal dividers that prevent deformation of the washers. The product is proudly manufactured in Sweden, reflecting Nord‑Lock’s commitment to European engineering standards and quality control.

Manufactured by Nord‑Lock, a recognized leader in fastener technology, the 1240 model has earned a solid reputation among engineers and procurement specialists. Its best‑seller rank of #75 in the Wedge Lock Washers category underscores its popularity and reliability across a wide range of sectors, from automotive manufacturing to heavy equipment assembly.

Usage

These wedge locking washers excel in environments where vibration is a constant factor, such as in motor mounts, gearboxes, and industrial pumps. Their ability to maintain torque under dynamic loads makes them ideal for securing bolts on rotating shafts, turbine components, and high‑speed conveyors. The zinc‑flake coating also protects against salt spray and chemical exposure, allowing use in marine applications, chemical processing plants, and outdoor installations.

Installation is straightforward: the washer is placed between the bolt head or nut and the mating surface, then tightened to the specified torque. As the bolt is torqued, the wedge mechanism engages, creating a secure lock without the need for additional locking compounds or locknuts. This simplicity reduces installation time and minimizes the risk of over‑torquing, which can damage components.

For maintenance crews, the washers provide a clear visual indicator of proper installation. When correctly seated, the washer’s split design aligns in a distinctive pattern, allowing quick verification during routine inspections. This feature is especially valuable in safety‑critical systems where missed or loose fasteners can lead to equipment failure.

Typical applications include securing flanges on pipelines, mounting brackets for heavy machinery, and fastening structural steel in construction projects. The 3/8‑inch size fits a broad range of bolt grades, from standard carbon steel to high‑strength alloy bolts, making the product versatile across multiple engineering specifications.

Why Choose Us

Choosing the Nord‑Lock 1240 wedge locking washer means selecting a product backed by decades of research and development in fastener technology. Nord‑Lock’s rigorous testing protocols include fatigue testing, corrosion exposure, and load cycling to ensure each washer meets or exceeds industry standards. This dedication to quality translates into consistent performance on the job site.

Our commitment to sustainability is reflected in the use of environmentally responsible coating processes. The zinc‑flake coating is applied using a low‑VOC (volatile organic compounds) method, reducing the environmental impact while still delivering exceptional protection against rust and oxidation.

Customer support is a cornerstone of our service model. Our technical team is available to assist with selection, installation guidance, and troubleshooting, ensuring that you receive the right solution for your specific application. We also offer comprehensive documentation, including torque tables, installation videos, and compliance certificates.

In addition to product reliability, we provide flexible shipping options and inventory management solutions. Whether you need a single pack for a prototype or bulk shipments for a large construction contract, our logistics network can accommodate your schedule and volume requirements.

Key Features

• Self‑locking wedge design prevents loosening under vibration and shock
• Zinc‑flake coating offers superior corrosion resistance for long‑term durability
• Precise 3/8‑inch size fits standard bolt and nut dimensions for easy installation
• Pack of 200 provides cost‑effective bulk supply for large projects
• Dedicated technical support and detailed installation resources for customer confidence

FAQ

What size bolt is the 1240 washer compatible with?

The 1240 washer is designed for a 3/8‑inch bolt diameter, which corresponds to standard M10 or 5/16‑inch fasteners. It works with both carbon steel and alloy bolts within the specified torque range.

Can the washer be used in marine environments?

Yes. The zinc‑flake coating provides excellent resistance to salt spray and moisture, making the washer suitable for marine and offshore applications where corrosion protection is essential.

How does the wedge mechanism lock the fastener?

When the bolt is tightened, the wedge wedges the split washer halves together, creating a mechanical lock that maintains tension even if the bolt experiences cyclic loading or vibration.

Is there a recommended torque value for installation?

Nord‑Lock provides torque tables specific to bolt grade and size. For a standard carbon steel bolt paired with the 1240 washer, a torque of 30–35 Nm (22–26 lb‑ft) is typically recommended, but you should always consult the manufacturer’s guidelines for your exact application.

What warranty does Nord‑Lock offer on this product?

The 1240 wedge locking washer comes with a limited one‑year warranty covering material defects and coating failures under normal use conditions. Contact our support team for warranty claims and replacement procedures.