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New 3E8017 Locknut Replacement suitable for Caterpillar Equipment
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Description for 3E8017 Locknut
â–¶Specification for 3E8017 Locknut
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Customer Reviews
Propel parts is a very reliable parts source for heavy equipment
Quick response,good quality parts,favourable prices and always deliver on time
I would give 5 stars but my first time ordering from here and using aftermarket parts. The price is reasonable comparing to original Cat parts and the customer support is great and hoping to do more business with them
100% recommend it is a good parts by par for five years and everything is good
Great prices prompt courteous customer service and fast shipping.
Above and Beyond
Staff took care of issue that was nit created by them. Package was lost by UPS. Propel sent me another part Next Day Air to correct it.
Awesome and diligent support. Would definitely recommend
Good Customer Service. Fast Shipping. A+++
Amazing Help.
I don't know who I spoke with, but they were helpful. We will be buying those parts shortly.
Buen servicio y atención
I own old cat bulldozers D8k,D8H,D8N that required frequent repairs and servicing. it was erratic and practically cumbersome to keep them running without constant supply of reliable
and affordable spares in Uganda a third world country however,since I started dealing with propel parts US,my bulldozers have earned reliability and efficiency in providing high quality services to clients and making me a great dependable construction company in earth moving.
My shipments are always handled expeditiously and delivered in record time to Uganda this is awesome from Propelparts.
My business is booming by the clock for finding the best partner in Propelparts.
Product Questions
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.
Compatible Models
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 | Returns
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.
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