RPI RPH189 7/16” External Tooth Washer

Yes, these washers are constructed from high-quality stainless steel, which is specifically chosen for its enhanced durability and superior resistance to both corrosion and wear in various shop environments.

Absolutely. The external tooth configuration is specifically engineered to provide a secure, vibration-resistant connection, ensuring that your fasteners remain tight even under fluctuating loads.

Yes, they are precisely sized at 7/16 inches, making them an excellent choice for critical fastening applications where accurate hardware dimensions are essential for a secure fit.

Each unit includes a package of 25 washers, providing a convenient quantity for inventory stocking, routine maintenance, or multi-component assembly projects.

Yes, the RPH189 is designed for general shop aids and hardware maintenance. They are perfect for securing components in environments where preventing the loosening of fasteners is a priority.

Indeed. They are part of the broader General Shop Aids category and are compatible with various assembly tasks. If you are looking for a broader range of options, they are also featured in the RPI Lockwasher Kit (RPI Part #RPK413).

Yes, these are factory-new components designed with a focus on tensile strength and reliability, ensuring they meet the high standards required for professional maintenance and equipment assembly.

Yes, each washer is extremely lightweight, weighing only 0.01 pounds. This makes them ideal for tasks where adding structural weight is a concern while still providing essential locking performance.

The external tooth design is specifically engineered to maximize surface contact and grip, which provides superior resistance to loosening compared to standard flat washers in demanding applications.

Because they are manufactured from durable stainless steel and built to resist vibration-induced loosening, they are an excellent choice for long-term, reliable service in maintenance and repair cycles.