-
Condition:
Factory New
-
Learn more:
-
MFR:
RPI
Ships from Manufacturer
- MPN: RPH180
- Phone: (800) 221-9723
+Free Shipping*
Shop with Confidence
Free Shipping
Free Returns
Sales Tax Exemption
+Dedicated Account Managers
Frequently asked questions
Are these washers made of rust-resistant material?
Yes, these RPI internal tooth washers are constructed from high-quality stainless steel, which provides excellent durability and superior resistance to corrosion.
How many washers come in one order?
Each package contains 50 individual washers, making it an efficient choice for stocking up on essential hardware for your mechanical assemblies.
What is the primary function of the internal teeth?
The internal tooth design is engineered to provide a strong grip on mating surfaces. This mechanism helps prevent the loosening of bolts and screws, ensuring your assemblies remain securely fastened over time.
What size bolt are these washers designed for?
These washers are precision-engineered with a 7/16-inch inner diameter, making them the perfect fit for 7/16-inch fasteners.
Are these suitable for professional shop environments?
Absolutely. These are classified under General Shop Aids and Hardware, designed for reliable performance in various mechanical applications where secure fastening is critical.
Can these be used as part of a larger kit?
Yes, the RPH180 washers are a key component found in the RPI Lockwasher Kit (Part #RPK413), allowing you to easily integrate them into your existing hardware maintenance workflow.
Are these considered genuine factory-new components?
Yes, all RPI RPH180 washers are provided as Factory New items, ensuring you receive pristine, high-quality hardware for your projects.
Are these washers complex to install?
Installation is straightforward and requires no complex assembly. Simply place the washer onto the fastener before tightening to allow the internal teeth to engage and secure the connection.
Is this specific washer part of a standard series?
Yes, this is part of the RPI general hardware line, specifically identified by the RPI part number RPH180, which is recognized for maintaining consistent sizing and manufacturing standards.
Are these washers built for long-term reliability?
By utilizing stainless steel, these washers are built to withstand environmental factors, ensuring that your bolted assemblies maintain their structural integrity and tightness for an extended period.

RPI RPH180 7/16” Internal Tooth Washer