Skip to content
-
Condition:
Factory New
-
Learn more:
-
MFR:
RPI
Ships from Manufacturer
- MPN: RPH178
- Phone: (800) 221-9723
+Free Shipping*
Shop with Confidence
Free Shipping
Free Returns
Sales Tax Exemption
+Dedicated Account Managers
Frequently asked questions
Is this washer built with durable materials?
Yes, these washers are constructed from high-quality stainless steel. This material choice ensures:
- Excellent corrosion resistance.
- Long-lasting durability in demanding maintenance environments.
- Consistent performance over time.
Does the design effectively prevent loosening?
Absolutely. These are Internal Tooth Lock Washers, which are specifically engineered to provide superior retention. They bite into the mating surfaces to resist vibration, keeping your critical fasteners securely in place.
Are these washers accurately sized for precision work?
Yes, they are precisely manufactured to a 5/16 inch size. This exact dimension ensures a proper, secure fit for critical fastening applications where tolerance matters.
Is this a convenient bulk quantity for shops?
Each order includes a package of 50 units. This quantity is ideal for:
- Stocking professional maintenance hardware bins.
- Ensuring you have enough supply for ongoing shop projects.
- Reducing the need for frequent reordering.
Are these suitable for professional maintenance environments?
They are categorized under General Shop Aids, making them a versatile and essential component for professional repair and maintenance hardware inventories. They are trusted for securing components where stability is key.
Can these be used with a larger washer kit?
Certainly. While these are available as a standalone pack, they are also a primary component of the RPI Lockwasher Kit (RPK413). Combining the individual pack with the full kit is a great way to maintain a comprehensive hardware assortment.
Are these brand-new, factory-standard components?
Yes, this item is sold in Factory New condition. You are receiving unused, reliable hardware that meets RPI’s strict standards for shop-grade fasteners.
Should I use these on high-vibration equipment?
Definitely. The internal tooth design is specifically intended for securing components where vibrations frequently occur. Using these washers helps prevent the “backing out” or loosening commonly associated with standard flat washers.
Will these help streamline my hardware inventory?
By standardizing your shop with high-quality components like the RPH178, you improve your maintenance efficiency. Having a reliable, dedicated stock of 50 washers ensures you are always prepared for immediate repairs.
Is professional support available for this hardware?
Yes. If you have questions about specific applications or compatibility, RPI provides customer support. You can reach their team directly at (800) 221-9723 for expert assistance.
RPI RPH178 5/16” Internal Tooth Washer