8T4223 Washer Hard for CAT Equipment
- New Washer Hard Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
Exact Fit Guarantee
This part is guaranteed to fit your machine.
Wrong Part?
We'll overnight correct part at no cost to you.
Exact Fit Guarantee®
×WILL PART FIT?
Yes, it will fit! We offer an Exact Fit Guarantee® or
get your money back.
HOW WE GUARANTEE, EXACT FIT
Before shipping your order, we use CAT SIS to ensure
this part is the exact fit for your equipment.
BUY WITH CONFIDENCE
Purchase with confidence because this part includes a
1 year warranty and it's guaranteed to fit & perform.
Description for 8T4223 Washer
▶Specification for 8T4223 Washer
▶Exact Fit Guarantee for 8T4223 Washer
▶| Dimensions | 0.39x0.39x0.08 |
|---|
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NEW MEXICO AG PARTS (New Mexico, USA)100%GREAT CUSTOMER SERVICED
WANTED TO THANK PROPEL PARTS FOR THEIR ATTENTION TO AN URGENT MATTER I HAD. THEY RESPONDED QUICKLY & RESOLVED IT. I ALSO WANTED TO MENYTION THAT OUR CUSTOMER'S ARE VERY HAPPY WITH THE PARTS EWE HAVE BEEN ORDERING FROM PROPEL. WE WILL DEFINITLEY CONTINUE TO DO BUSINESS. -
Diego Romero (Uruguay)100%Good service, quick response.
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Susan (West Virginia, USA)100%Satisfied Customer.
I made my first purchase from Propel Parts last week. I was very happy with the response time and the delivery was fast, fast, fast! Also, the quality of the product is superb and at a great low price.
Keep up the great work! -
David Lisiecki (Michigan, USA)100%Great pricing and fast shipping!
I'll admit that I was skeptical of propel parts, but they are an honest site and came through with the order. I was skeptical because I've never ordered heavy machinery parts, and didn't know who to trust. The parts that I ordered showed in stock, but after checking with their vendor, they only had half of the order in stock. I was notified the day after the order, and most of the parts arrived in a few days. There was one part that was not shipped putz but I was able to talk with who I assumed is the owner who rectified the situation and had the part overnighted to me.
I will say that communication speed could use a little work, but they will eventually get back with you. -
Obiyomi Oluwole (Nigeria)100%Propel parts is a good Cat vendor that provides a top notch service to customers from ordering to delivery. Their after sales service is really impressive.
Frequently Asked Questions
What is the 8T4223 hard washer used for in Caterpillar equipment?
The 8T4223 hard washer is a heavy-duty washer designed for critical Caterpillar machinery applications. It helps evenly distribute the load from bolts or nuts, preventing surface damage and ensuring secure fastening. Its hardened design makes it ideal for high-stress areas exposed to vibration, pressure, or heavy mechanical loads.
Which Caterpillar machines use the 8T4223 hard washer?
Designed for use in a variety of Caterpillar machines and engine systems, the 8T4223 fits applications where reliable performance is essential. Since compatibility can vary by machine configuration and serial range, it\'s worth verifying the part number in your service manual before ordering — or reach out to Propel Parts for fitment confirmation.
Why is a hardened washer like the 8T4223 important in heavy equipment?
Hardened washers provide extra strength and reliability. The 8T4223 Caterpillar hard washer helps:
- Distribute clamping force evenly across the surface
- Protect components from damage caused by bolts or nuts
- Reduce fastener loosening due to vibration
- Resist wear, deformation, and high-load stress
These benefits ensure stable and dependable equipment operation under demanding conditions.
Does the 8T4223 hard washer meet OEM performance standards?
Yes, it does. Engineered to meet OEM specifications, the 8T4223 is a dependable replacement for the original part. If you\'re unsure whether it\'s the right match for your machine, contact Propel Parts and our team can assist.
How do you install the 8T4223 hard washer correctly?
Proper installation ensures secure fastening and equipment safety. General steps include:
- Turn off the equipment and make sure the work area is safe
- Remove the existing bolt or fastener from the assembly
- Inspect the mounting surface and fastener for wear or damage
- Place the new 8T4223 hard washer between the bolt head (or nut) and the surface
- Reinstall the fastener and tighten it according to the manufacturer's torque specifications
Always refer to your service manual for detailed instructions.
When should the 8T4223 hard washer be replaced?
Replace the washer if it shows signs of corrosion, cracks, deformation, or excessive wear. In heavy-duty equipment exposed to vibration and high loads, replacing worn washers with a 8T4223 washer replacement during maintenance helps maintain proper bolt tension and protects surrounding components.
Can I use an aftermarket replacement for the 8T4223 Caterpillar hard washer?
Of course. Premium aftermarket 8T4223 replacements built to OEM standards are a common and practical choice. What matters most is selecting a part that meets the required specs — ensuring proper fitment and reliable long-term performance.

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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1 YEAR UNLIMITED WARRANTY
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