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New 3E8017 Locknut Replacement suitable for Caterpillar Equipment
- New Locknut 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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Description for 3E8017 Locknut
â–¶Specification for 3E8017 Locknut
â–¶Exact Fit Guarantee for 3E8017 Locknut
â–¶| Models | 120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12K, 12M, 135H, 135H NA, 140G, 140K, 140K 2, 140M, 140M 2, 160K, 160M, 160M 2, 163H, 16H, 2290, 2390, 2391, 2491, 2590, 30/30, 3114, 3116, 3126, 3126B, 3126E |
|---|---|
| Dimensions | 0.67x0.67x0.20 |
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At the beginning, I experienced significant delays and communication issues regarding my order, which honestly caused serious concern because the parts were urgently needed for an important project.
However, after continuous follow-up, the Propel Parts team handled the matter professionally, provided shipment tracking, and the parts finally arrived successfully.
I especially appreciate their willingness to communicate, acknowledge the issue, and continue working toward resolving the situation.
In international business, delays can sometimes happen, but what matters is the final commitment to resolving the issue properly.
Thank you to Daniel and the team, and hopefully future transactions will be smoother for both sides. -
Great affordable option for aftermarket parts
Found Propel Parts while looking for parts to repair a D6C dozer that has been sitting for 20 years. Great parts, great prices, fast shipping and excellent customer service. -
A Delay Handled the Right Way
Honestly, if I were in Miami like my shipment was, I wouldn?t have been in a hurry to ship out either. I was frustrated at first ? delays cost me time on the job ? but Propel Parts stepped up.
Deb, Daniel and the team owned the mistake, kept the communication clear, and graciously refunded my shipping costs without making it a hassle. That kind of accountability is rare these days, and I genuinely appreciated how they handled it.
Things don?t always go perfectly, but these folks proved they?re more interested in doing right by their customers than just pushing parts out the door. Solid company, solid people.
? Jimmy Spong
Hartco Mobile Welding
P.S. Incredible quality on the pin as well. I had to do some custom modifying, and let?s just say the case hardening was ? well ? hard. Great Stuff! Thank you. -
Excellent service and quick response!
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Excellant customer service!
The prices are very good! The customer service is excellant! I had to contact them because our tax info wasn't right and they refunded it on the spot! Great job! we will be doing a lot more ordering from thi company. Highly recommended!
Frequently Asked Questions
What is the Caterpillar 3E8017 locknut used for?
The 3E8017 locknut is a precision fastening component used across a wide range of Caterpillar equipment. It is designed to resist vibration-induced loosening, which makes it ideal for securing critical joints on engines, structural assemblies, and attachment points that are subject to heavy loads and continuous movement.
What equipment models is this locknut compatible with?
This locknut is compatible with multiple Caterpillar machine families. Always verify the part number against your specific model and serial number before ordering. Check your manual or reach out to Propel Parts for help verifying fitment.
How do I know when a locknut needs to be replaced?
Signs that a locknut needs replacing include visible thread damage, rounding of the hex profile, rust or corrosion that weakens the grip, or a joint that continually loosens even after retorquing. During scheduled service intervals, inspect all locknuts and replace any that show wear.
Can I use an aftermarket locknut on my CAT equipment?
Yes. High-quality aftermarket locknuts that meet or exceed OEM specifications are a practical and cost-effective choice. When replacing worn fasteners, choose parts that match the correct thread pitch, hardness grade, and dimensional tolerance for your application. You can browse our full range of CAT hardware parts to find compatible fasteners across all categories.
What torque specifications should I follow when installing this locknut?
Always refer to the Caterpillar service manual for the specific torque values associated with the joint or assembly where this locknut is used. Using a calibrated torque wrench and following proper torquing sequences helps prevent joint failure, component damage, and safety hazards on the job site.
Does this locknut require a matching bolt or stud?
Yes ??? locknuts must be matched to the correct bolt or stud specification, including thread size, pitch, and grade. Mismatched fasteners can strip threads or lead to joint failure. Confirm that both the bolt and locknut are rated for the same load requirements of the assembly.
What warranty comes with the 3E8017 locknut from Propel Parts?
All parts from Propel Parts are covered by a 1-year unlimited mileage warranty against manufacturing defects and material failures. If you experience any issues, the Propel Parts team is here to make it right with fast support and hassle-free resolutions.
This 3E8017 Locknut is compatible with the following models:
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12K, 12M, 135H, 135H NA, 140G, 140K, 140K 2, 140M, 140M 2, 160K, 160M, 160M 2, 163H, 16H, 2290, 2390, 2391, 2491, 2590, 30/30, 3114, 3116, 3126, 3126B, 3126E & more...
Shipping
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.
Easy Returns
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.
Warranty
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.
Exact Fit Guarantee®
The right part — or we'll make it right.
Order Normally
Know your part number? Simply place your order.
Not Sure?
Place your order, then send us your serial number before it ships.
We'll verify fit.
We Make It Right
Wrong part? We'll make it right.Fast. At our expense.
1 YEAR UNLIMITED WARRANTY
ORDER BY 3PM EST. EXCL. WEEKEND
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EASY RETURNS & FAST REFUNDS
