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Condition:
Factory New
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Learn more:
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MFR:
RPI
Ships from Manufacturer
- MPN: RPH181
- Phone: (800) 221-9723
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Frequently asked questions
Is the stainless steel grade corrosion-resistant?
Yes, these washers are constructed from high-quality stainless steel. This material choice provides superior resistance to corrosion and general wear, making them an excellent choice for long-term reliability in various mechanical applications.
Does the internal tooth design help with vibration?
Absolutely. The internal tooth design is specifically engineered to provide enhanced friction and locking capability. This structure helps prevent fasteners from loosening over time, even in environments where vibration is a factor.
Are these washers suitable for heavy-duty assembly?
These washers are designed for general maintenance and assembly applications where secure fastening is required. Their 1/2-inch size and robust stainless steel construction make them ideal for tasks demanding reliable mechanical integrity.
How many washers are included in one order?
Each order includes a convenient pack of 25 individual internal tooth washers, which is an excellent quantity for stocking your shop or completing medium-volume projects.
Can I use these with other RPI shop aids?
Yes, the RPH181 is a genuine RPI part designed to fit seamlessly within the RPI ecosystem. They are intended to complement other general hardware and shop aids found in the RPI catalog.
Is this washer available in larger hardware kits?
Yes, if you are looking to expand your supply, this specific washer is also included as a component in the RPI Lockwasher Kit (Part #RPK413).
Is the manufacturing condition guaranteed?
Every unit provided is Factory New. We source directly from the manufacturer to ensure that you receive pristine, high-quality components for your hardware needs.
Are these washers precise in their dimensions?
Yes, the RPI RPH181 is precisely manufactured to a 1/2-inch nominal size to ensure a reliable and accurate fit for your designated hardware applications.
What is the expected lead time for shipping?
These items ship directly from the manufacturer with an estimated lead time of 1 to 2 weeks.
Is this part considered active production?
Yes, the RPH181 is an active product. It remains a standard part of the current RPI lineup, ensuring you can rely on consistent availability for your maintenance projects.

RPI RPH181 1/2” Internal Tooth Washer