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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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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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Great customer service.
Prompt , knowledgeable and friendly service. -
The customer care response was very awesome. It was more than what I expected
The customer care response was very effective and timely
The response time was amazing
The availability of most of the parts that I wanted was also very awesome
Thanks keep it up -
Customer service was great! There was a small problem with the part and they responded quickly and respectfully until was resolved! Highly recommended
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I’ve been ordering parts from propel for about 3 years & counting. I live in Hawaii where we have a hard time getting parts especially for decent prices with fast shipping. I've been 100% satisfied with the company and the customer service and will continue to use them. I recommend propel to everyone here in Hawaii and we are all happy to have you guys. Thank you!!!
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.
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Place your order, then send us your serial number before it ships.
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1 YEAR UNLIMITED WARRANTY
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EASY RETURNS & FAST REFUNDS
