320B Nut - Caterpillar Excavator

DescriptionAre you looking for a Nut for your 320B Caterpillar Excavator? You've come to the right place! Give us a call to get a quote or to verify the price listed. Our part specialists are available Mon-Fri 8am-6pm EST to assist you.

Part #: 7X0851
Weight: 0.30

WARNING : Cancer and Reproductive harm. See www.P65Warnings.ca.gov

*Please call to help verify fitment and always confirm the part number before ordering.

Pricing & Availability

This part is quoted individually — new, rebuilt and used options are often available. Get a fast online quote, or call or text a real parts person.

Call or Text 1-800-255-6253

Quotes answered Mon–Fri 8am–6pm EST · Net-30 terms available for approved accounts

Fitment Guarantee If it doesn’t fit, we make it right — fast.

Fast Order Processing Most orders ship within 1–2 business days.

Real Parts People Call, text, or chat with a parts expert.

Fits These Machines

Partial list from OEM application data. Not sure? Call or text us with your model and serial number and we’ll verify fitment.

Caterpillar 28

120M 315B Excavator 316E L 315C Excavator 320D L 320D Excavator 320B Excavator 318D L 320D LRR 320D GC 320C Excavator 318D2 L 315D L Excavator 24M 24H 16H 16M 160M 3 160M 140M 3 160M 2 14M 140M 2 12M 3 140M 12M 2 12M 120M 2

About Our Conditions

Condition	What you get	Warranty
New Aftermarket	New aftermarket part made to fit this application, AMS-branded, hardware kit included	12 months
Rebuilt	Professionally rebuilt to spec; refundable core charge, return label provided (30 days, same part number, rebuildable)	6 months
Used	Inspected used take-offs — call or text for current availability and pricing	Call for details

Not all inventory / options shown. Our goal is to provide new, rebuilt and used options! Call or get a quick quote!

Don't see what you're looking for? New aftermarket, used and rebuilt options!

Need a little extra help? Give one of our friendly, knowledgeable parts experts a call and we'll have your machine back up and running in no time.

Call a Parts Expert!

Cody Debord did a fantastic job finding the the final drives for my old obsolete excavator, working through all the issues and patiently solving one problem after another, until I was up and running and completely satisfied with the entire experience...

Jim Holmes

Dealt with Brandon G. Dude knows his parts and had what I needed. We received the part and due to the value I decided it was safer to use brand new. I paid for return shipping and received a credit back for the part. The whole process was smooth.

Matt Boike

Brooke Bussard has always went above and beyond great customer service. I have dealt with her 4-5 times in the past year and every time she has been awesome to work with. She’s always gotten me everything at a great price.

Jason Stewart

Customer support is very helpful, Racheal communicated promptly and professionally. I even had a concern with a certain product and pricing that didn’t work out as planned, and one of the managers, Matt, emailed me directly to take care of the situation...

Marc Hadfield

Knowledgeable and helpful staff, good pricing and availability on in stock or sourced parts.