Nut Lock Special Thin Plain

Enhance your heavy equipment’s performance with the Case Construction Nut Lock – Special Thin Plain #131-37. Designed for durability and precision, this essential component ensures secure fastening, optimizing your machinery’s efficiency and reliability on the job site.

Compatible equipment

This part fits CASE COMBINE, CASE SELF-PROPELLED WINDROWER, CASE 6-ROW CORN HEAD, CASE CRAWLER TRACTOR, CASE PULL-TYPE COMBINE, CASE SIDE DELIVERY RAKE, CASE CRAWLER TRACTOR (PRIOR TO S/N 3038436), CASE CRAWLER TRACTOR (S/N 3038436 TO 3060306), CASE CRAWLER TRACTOR (S/N 3060306 & AFTER), CASE LONG TRACK CRAWLER TRACTOR, CASE PULL-TYPE COMBINE W/PTO DRIVE, CASE CONSTRUCTION KING LOADER BACKHOE, IND - CASE CRAWLER TRACTOR, CASE CONSTRUCTION KING LOADER BACKHOE AFTER S/N 3739160 (EUROPE), CASE CONSTRUCTION KING LOADER BACKHOE BEFORE S/N 3739160 (EUROPE), CASE CONSTRUCTION KING FORKLIFT, CASE CRAWLER TRACTOR (AFTER S/N 7070351), CASE CRAWLER TRACTOR (EUROPE), CASE CRAWLER TRACTOR (S/N 7073469 & AFTER) (NORTH AMERICA), CASE CRAWLER TRACTOR (UP TO S/N 7073468) (NORTH AMERICA), CASE WHEEL LOADER W/POD CAB - NEW YORK STATE SPECIAL, CASE ARTICULATED WHEEL LOADER W/POD CAB (S/N 9120696 & AFTER) including models 1010, 1060, 1255, 1660, 306, 350, 350B, 400, 401, 450, 450C, 455C, 460, 480F, 480F LL, 550, 550E, 550G, 550H, 580C, 580F, 580G, 584C, 584E, 585C.

Frequently asked questions

What is the part number?

The manufacturer part number is 131-37.

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.

Ships nationwide. In-stock parts ordered before 2:30 PM ET ship the same business day. Your exact shipping cost and delivery estimate are calculated at checkout from your ZIP code and the part’s size and weight; oversized and truck-freight items may need extra transit time and freight charges.

Free branch pickup is also available across Ohio, Indiana, Michigan, and Kentucky — just choose it at checkout.

30-day returns. New, unused parts in original packaging may be returned within 30 days. Some items — including electrical, special-order, and direct-from-supplier parts — are non-returnable. See our full return policy.