Lock Nut

Ensure optimal performance and safety with the Case Construction Lock Nut #131-22. Designed for heavy equipment, this durable lock nut provides secure fastening, preventing loosening under vibration. Perfect for maintaining the reliability of your machinery on any job site.

Compatible equipment

This part fits BACKHOE, CASE CRUZ-AIR WHEELED EXCAVATOR, CASE LOGGER CRAWLER EXCAVATOR, CASE FELLER/BUNCHER CRAWLER EXCAVATOR, CASE/BELOIT SKID KING WHEEL LOADER, CASE SKID KING WHEEL LOADER, BACKHOE AND LOADER FOR 530CK TRACTORS, BACKHOE FOR W7, W9A, W9B, W10, BACKHOE AND LOADER, BACKHOE FOR 310G AND 450 CRAWLER, BACKHOE FOR 580CK, BACKHOE FOR W SERIES RIGID LOADERS, BACKHOE FOR CRAWLER MODELS 750, 850, 1150, BACKHOE FOR 680CK TRACTOR, BACKHOES FOR CRAWLER MODELS 750, 850, 1150, BACKHOE FOR 450, 450B, 850, 850B, AND W14, DROTT SERIES-A CRAWLER EXCAVATOR, CASE CONSTRUCTION KING LOADER BACKHOE, CASE WHEEL LOADER, CASE ARTICULATED WHEEL LOADER including models 36, 1085B, 1086B, 1187, 1187B, 1187C, 300, 300C, 31, 32, 32S, 33, 33S, 34, 35, 400, 400C, 40EC, 40YC, 780, 780B, 780C, W18B, W24, W8B.

Frequently asked questions

What is the part number?

The manufacturer part number is 131-22.

Is this a genuine OEM part?

Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.

Will this fit my machine?

See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.

Where does this ship from?

Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.

Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.

30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.