RPI RPH187 5/16” External Tooth Washer

Yes, these washers are constructed from high-quality stainless steel. This material selection is intentional to ensure:

• Superior corrosion resistance.
• Enhanced durability in demanding mechanical environments.
• Long-lasting performance without degradation.

These are External Tooth Lock Washers, which are specifically designed to provide high-performance locking. The teeth are engineered to dig into the mating surface, creating significant friction that effectively prevents fasteners from backing out due to vibration or dynamic loads.

Absolutely. Each order provides excellent value by including a package of 50 units. This quantity is ideal for maintaining a well-stocked inventory for various general shop aid and hardware assembly projects.

Yes, they are highly versatile. They are categorized as general shop aid hardware and are perfect for any application where a secure, vibration-resistant connection is required for 5/16” fasteners.

The washers are manufactured to a precise 5/16” nominal size. This exact sizing ensures they fit standard 5/16” hardware assemblies perfectly, providing a secure and reliable fit.

Yes. If you are looking to expand your hardware collection, these washers can be seamlessly combined with the RPI Lockwasher Kit (Part #RPK413) to ensure you have a comprehensive selection of hardware for all your maintenance needs.

The RPI RPH187 is a top-tier factory-new replacement part. It is designed to meet rigorous standards for general shop aid hardware applications, making it a dependable choice for replacing worn or missing components.

The external tooth design offers a wider contact diameter compared to internal tooth washers. This increases the effective surface area for the teeth to engage with the fastener head or nut, providing maximum resistance against rotation and loosening.

Yes. Because they are manufactured from stainless steel, they offer excellent resistance to environmental factors, including moisture, making them suitable for use in environments where corrosion could be a concern for lesser-quality metals.

Each package of 50 washers is lightweight and compact, weighing approximately 0.01 pounds, making them easy to store, organize, and transport within your shop or tool kit.