Square Nut
| Machine | Model | Years / S/N |
|---|---|---|
| CASE CRAWLER EXCAVATOR | 1080 | 1983 – 1986 |
| CASE CRAWLER EXCAVATOR | 1080B | 1986 – 1988 |
| CASE CRAWLER TRACTOR | 1150B | 1973 – 1984 |
| CASE CRAWLER TRACTOR (NORTH AMERICA) | 1150C | 1978 – 1984 |
| CASE CRAWLER TRACTOR | 1150D | 1976 – 1986 |
| CASE CRAWLER TRACTOR | 1150E | 1985 – 1994 |
| CASE CRAWLER TRACTOR | 1150G | 1995 – 1999 |
| CASE CRAWLER TRACTOR | 1150H | 2000 – 2006 |
| SERIES 3 CRAWLER DOZER TIER 3 (NA/EU) | 1150K | 2006 – 2013 |
| CRAWLER DOZER - TIER 4A | 1150M LT | 2012 – 2016 |
Enhance your heavy equipment’s performance with the Case Construction Square Nut #R25688. Designed for durability and precision, this essential part ensures secure connections in your machinery, optimizing efficiency and reliability on the job site. Perfect for Case equipment maintenance and repairs.
Compatible equipment
This part fits CASE CRAWLER EXCAVATOR, CASE CRAWLER TRACTOR, CASE CRAWLER TRACTOR (NORTH AMERICA), SERIES 3 CRAWLER DOZER TIER 3 (NA/EU), CRAWLER DOZER - TIER 4A, CASE LOGGER CRAWLER EXCAVATOR, DROTT SERIES-B FELLER/BUNCHER CRAWLER EXCAVATOR, DROTT SERIES-B CRAWLER EXCAVATOR, DROTT SERIES-A CRAWLER EXCAVATOR, SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005, SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006, SERIES 3 CRAWLER TIER 2 - 06/20/2006 - 12/31/2008, CRAWLER DOZER TIER 3 including models 1080, 1080B, 1150B, 1150C, 1150D, 1150E, 1150G, 1150H, 1150K, 1150M LT, 1150M WT/LGP, 1155D, 1155E, 1187, 1187B, 1280, 1280B, 40BLC, 40EC, 40YC, 50, 650G, 650H, 650K, 750H.
Frequently asked questions
What is the part number?
The manufacturer part number is R25688.
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.
WARNING:For California residents — Cancer and Reproductive Harm. www.P65Warnings.ca.gov
- Manufacturer part number
- R25688
- Brand
- Case Construction
- Condition
- OEM, new
- Category
- Case Construction
- Weight
- 0.11 lb
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.
All 43 fitments
| Machine | Model | Years / S/N |
|---|---|---|
| CASE CRAWLER EXCAVATOR | 1080 | 1983 – 1986 |
| CASE CRAWLER EXCAVATOR | 1080B | 1986 – 1988 |
| CASE CRAWLER TRACTOR | 1150B | 1973 – 1984 |
| CASE CRAWLER TRACTOR (NORTH AMERICA) | 1150C | 1978 – 1984 |
| CASE CRAWLER TRACTOR | 1150D | 1976 – 1986 |
| CASE CRAWLER TRACTOR | 1150E | 1985 – 1994 |
| CASE CRAWLER TRACTOR | 1150G | 1995 – 1999 |
| CASE CRAWLER TRACTOR | 1150H | 2000 – 2006 |
| SERIES 3 CRAWLER DOZER TIER 3 (NA/EU) | 1150K | 2006 – 2013 |
| CRAWLER DOZER - TIER 4A | 1150M LT | 2012 – 2016 |
| CRAWLER DOZER - TIER 4A | 1150M WT/LGP | 2012 – 2016 |
| CASE CRAWLER TRACTOR | 1155D | 1983 – 1986 |
| CASE CRAWLER TRACTOR | 1155E | 1985 – 1994 |
| CASE LOGGER CRAWLER EXCAVATOR | 1187 | 1983 – 1985 |
| CASE LOGGER CRAWLER EXCAVATOR | 1187B | 1985 – 1988 |
| CASE CRAWLER EXCAVATOR | 1280 | 1980 – 1984 |
| CASE CRAWLER EXCAVATOR | 1280B | 1983 – 1986 |
| DROTT SERIES-B FELLER/BUNCHER CRAWLER EXCAVATOR | 40BLC | 1971 – 1984 |
| DROTT SERIES-B CRAWLER EXCAVATOR | 40EC | 1971 – 1984 |
| DROTT SERIES-B CRAWLER EXCAVATOR | 40YC | 1971 – 1984 |
| DROTT SERIES-A CRAWLER EXCAVATOR | 50 | 1968 – 1979 |
| CASE CRAWLER TRACTOR | 650G | 1994 – 1999 |
| CASE CRAWLER TRACTOR | 650H | 2000 – 2002 |
| SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005 | 650K | 2002 – 2005 |
| SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006 | 650K | 2005 – 2008 |
| SERIES 3 CRAWLER TIER 2 - 06/20/2006 - 12/31/2008 | 650K | 2005 – 2008 |
| CASE CRAWLER TRACTOR | 750H | 2000 – 2002 |
| SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005 | 750K | 2002 – 2005 |
| SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006 | 750K | 2005 – 2008 |
| CRAWLER DOZER TIER 3 | 750L | 2008 – 2012 |
| CRAWLER DOZER - TIER 4A | 750M LT | 2013 – 2016 |
| CRAWLER DOZER - TIER 4A | 750M WT/LGP | 2012 – 2016 |
| CASE CRAWLER TRACTOR | 850G | 1994 – 1999 |
| CASE CRAWLER TRACTOR | 850H | 2000 – 2002 |
| SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005 | 850K | 2002 – 2005 |
| SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006 | 850K | 2005 – 2008 |
| SERIES 3 CRAWLER TIER 2 - 06/20/2006 - 12/31/2008 | 850K | 2005 – 2008 |
| CRAWLER DOZER TIER 3 | 850L | 2008 – 2013 |
| CRAWLER DOZER - TIER 4A | 850M LT | 2013 – 2016 |
| CRAWLER DOZER - TIER 4A | 850M WT/LGP | 2013 – 2016 |
| CRAWLER DOZER - TIER 4A | D150C XLT | 2013 – 2016 |
| CRAWLER DOZER TIER 3 | D85B | 2008 – 2012 |
| CRAWLER DOZER TIER 3 | D95B | 2008 – 2012 |