New 3B4512 Lockwasher Replacement suitable for Caterpillar Equipment
- New Lockwasher 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.
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×WILL PART FIT?
Yes, it will fit! We offer an Exact Fit Guarantee® or
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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 3B4512 Lockwasher
▶Specification for 3B4512 Lockwasher
▶Exact Fit Guarantee for 3B4512 Lockwasher
▶| Dimensions | 1.26x1.26x0.20 |
|---|
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Tony White (Iowa, USA)100%I put 2 of the same orders in due to a web page error and shortly after I was contacted by Deb from customer service asking if I meant to place both orders. She was very helpful, the email was very well written and it genuinely made me feel better about the whole experience. She resolved the issue quickly and with there not being much of customer service these days I was very happy so see that is not the case everywhere!!!
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Fernando (Mexico)100%Tiene una buena atención y servicio
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Omesh Jankie (Florida, USA)100%Quick Respond.
The quick respond much appreciated.
Keep this up. -
Fernando (Mexico)100%Buen servicio y atención
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Susan100%Very knowledgeable and quick to quote parts.
Very quick to respond to parts quotes. Knowledgeable and Polite, and very quick shipping. Definitely will purchase parts from these guys in the future.
Frequently Asked Questions
What is the Caterpillar 3B4512 lockwasher used for?
The 3B4512 lockwasher is designed to secure bolts and fasteners in Caterpillar equipment assemblies. Its split-spring design helps maintain tension on the fastener, preventing bolts from loosening due to vibration, heavy loads, or continuous equipment operation.
What are the key specifications of the 3B4512 lockwasher?
The 3B4512 lockwasher typically features an inside diameter of approximately 0.761–0.791 inches, an outer diameter of about 1.010 inches, and a thickness of around 0.188 inches. These dimensions allow it to provide strong locking support for heavy-duty fasteners used in Caterpillar machinery.
Is the 3B4512 lockwasher an OEM-spec replacement part?
Yes. Many suppliers manufacture the 3B4512 lockwasher to meet U.S. OEM specifications, ensuring the same durability, fit, and performance as the original Caterpillar component used in equipment assemblies.
Why are lockwashers important in heavy equipment?
It does. The 3B4512 is designed to meet or exceed OEM specifications, providing consistent performance in the applications it was built for. Have questions about your specific machine? Reach out to Propel Parts for guidance.
How can I confirm if the 3B4512 lockwasher fits my Caterpillar machine?
To verify compatibility, check the equipment model, serial number, or existing part number. Many parts suppliers also confirm fitment using CAT SIS (Caterpillar Service Information System) before shipping to ensure the lockwasher matches your machine.
When should the 3B4512 lockwasher be replaced?
You should replace the lockwasher if it shows signs of wear, corrosion, deformation, or reduced spring tension. Replacing worn lockwashers during maintenance helps maintain secure fasteners and prevents unexpected equipment issues.
Does the 3B4512 lockwasher come with a warranty?
Propel Parts stands behind the products it offers. For questions about warranty coverage or return options on the 3B4512, contact the Propel Parts team directly for details specific to your order.

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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