Square Nut
Case Construction ·42 Fitments
| Machine | Model | Years |
|---|---|---|
| CASE CRAWLER EXCAVATOR (NORTH AMERICA) | 125B | 1988 – 1989 |
| CASE IH AXIAL-FLOW COMBINE (S/N JJC0045689 & AFTER) (NORTH AMERICA) | 1680 | 1989 – 1992 |
| CASE IH AXIAL-FLOW COMBINE | 1688 | 1993 – 1994 |
| CASE IH AXIAL-FLOW COMBINE (NA) | 2188 | 1995 – 1997 |
| CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540 | 2388 | 1997 – 2004 |
| CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000 | 2388 | 1998 – 2007 |
| CASE IH AXIAL-FLOW COMBINE (NA) ASN HAJ300001 | 2588 | 2006 |
| DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6266131 & AFTER) | 35 | 1977 – 1981 |
| CASE LONG TRACK CRAWLER TRACTOR | 550 | 1989 – 1991 |
| CASE LONG TRACK CRAWLER TRACTOR | 550E | 1992 – 1994 |
OEM Case Construction Square Nut #R57375 ? Lock Fasteners with OEM Square Nut Strength
This Square Nut (#R57375) secures bolts in Case assemblies. OEM threading and shape offer strong grip, especially in slots or recessed channels.
More Details
Part Number: R57375
Application: Structural and mechanical fastening
Key Features:
- OEM-matched thread pitch
- Durable material with rust-resistant coating
- Compatible with carriage bolts and brackets
Fits Case Models: Confirm bolt size and mounting location.
Compatible equipment
This part fits CASE CRAWLER EXCAVATOR (NORTH AMERICA), CASE IH AXIAL-FLOW COMBINE (S/N JJC0045689 & AFTER) (NORTH AMERICA), CASE IH AXIAL-FLOW COMBINE, CASE IH AXIAL-FLOW COMBINE (NA), CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540, CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000, CASE IH AXIAL-FLOW COMBINE (NA) ASN HAJ300001, DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6266131 & AFTER), CASE LONG TRACK CRAWLER TRACTOR, CASE CRAWLER TRACTOR, IND - CASE CRAWLER TRACTOR, CRAWLER DOZER TIER 3 (HYDRO), CASE CRAWLER EXCAVATOR (PRIOR TO S/N CGG0011601), CASE CRAWLER EXCAVATOR (S/N CGG0011601 & AFTER), CASE CRAWLER EXCAVATOR (S/N 120301 & AFTER), CASE CRAWLER EXCAVATOR (S/N 10501 & AFTER), POCLAIN CRAWLER EXCAVATOR, CASE CRAWLER EXCAVATOR, CASE CRAWLER EXCAVATOR (S/N 15401-) (S/N 106801-), CASE CRAWLER EXCAVATOR (S/N 74163-74418) (S/N 15201-), CASE TURNTABLE LEVELER CRAWLER EXCAVATOR, CASE/POCLAIN CRAWLER EXCAVATOR (S/N 9501 & AFTER), CRAWLER DOZER TIER 3, POCLAIN CRAWLER EXCAVATOR (NORTH AMERICA) including models 125B, 1680, 1688, 2188, 2388, 2588, 35, 550, 550E, 550G, 550H, 650, 650G, 650L, 688, 688BCK, 688C, 75C, 850B, 850C, 850D, 850E, 850G, 855C, 855D.
Frequently asked questions
What is the part number?
The manufacturer part number is R57375.
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.
- Manufacturer part number
- R57375
- Internal SKU
- IC:R57375
- Brand
- CASE CONSTRUCTION
- Condition
- OEM, new
- Category
- Case Construction
- Weight
- 0.09 lb
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.
All 42 fitments
| Machine | Model | Years |
|---|---|---|
| CASE CRAWLER EXCAVATOR (NORTH AMERICA) | 125B | 1988 – 1989 |
| CASE IH AXIAL-FLOW COMBINE (S/N JJC0045689 & AFTER) (NORTH AMERICA) | 1680 | 1989 – 1992 |
| CASE IH AXIAL-FLOW COMBINE | 1688 | 1993 – 1994 |
| CASE IH AXIAL-FLOW COMBINE (NA) | 2188 | 1995 – 1997 |
| CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540 | 2388 | 1997 – 2004 |
| CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000 | 2388 | 1998 – 2007 |
| CASE IH AXIAL-FLOW COMBINE (NA) ASN HAJ300001 | 2588 | 2006 |
| DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6266131 & AFTER) | 35 | 1977 – 1981 |
| CASE LONG TRACK CRAWLER TRACTOR | 550 | 1989 – 1991 |
| CASE LONG TRACK CRAWLER TRACTOR | 550E | 1992 – 1994 |
| CASE LONG TRACK CRAWLER TRACTOR | 550G | 1995 – 1998 |
| CASE CRAWLER TRACTOR | 550H | 1999 – 2008 |
| IND - CASE CRAWLER TRACTOR | 550H | 1999 – 2008 |
| CASE CRAWLER TRACTOR | 650 | 1990 – 1991 |
| CASE CRAWLER TRACTOR | 650G | 1994 – 1999 |
| CRAWLER DOZER TIER 3 (HYDRO) | 650L | 2008 – 2017 |
| CASE CRAWLER EXCAVATOR (PRIOR TO S/N CGG0011601) | 688 | 1985 – 1993 |
| CASE CRAWLER EXCAVATOR (S/N CGG0011601 & AFTER) | 688 | 1989 – 1993 |
| CASE CRAWLER EXCAVATOR (S/N 120301 & AFTER) | 688BCK | 1993 – 1996 |
| CASE CRAWLER EXCAVATOR (S/N 10501 & AFTER) | 688C | 1989 – 1993 |
| POCLAIN CRAWLER EXCAVATOR | 75C | 1975 – 1987 |
| CASE CRAWLER TRACTOR | 850B | 1976 – 1984 |
| CASE CRAWLER TRACTOR | 850C | 1981 – 1984 |
| CASE LONG TRACK CRAWLER TRACTOR | 850D | 1985 – 1994 |
| CASE LONG TRACK CRAWLER TRACTOR | 850E | 1992 – 1994 |
| CASE CRAWLER TRACTOR | 850G | 1994 – 1999 |
| CASE CRAWLER TRACTOR | 855C | 1984 |
| CASE LONG TRACK CRAWLER TRACTOR | 855D | 1985 – 1994 |
| CASE LONG TRACK CRAWLER TRACTOR | 855E | 1992 – 1994 |
| CASE CRAWLER EXCAVATOR | 880 | 1971 – 1980 |
| CASE CRAWLER EXCAVATOR | 880B | 1976 – 1980 |
| CASE CRAWLER EXCAVATOR | 880C | 1980 – 1984 |
| CASE CRAWLER EXCAVATOR | 880D | 1984 – 1987 |
| CASE CRAWLER EXCAVATOR (S/N 15401-) (S/N 106801-) | 888 | 1989 – 1993 |
| CASE CRAWLER EXCAVATOR (S/N 74163-74418) (S/N 15201-) | 888 | 1986 – 1991 |
| CASE TURNTABLE LEVELER CRAWLER EXCAVATOR | 888 | 1986 – 1993 |
| CASE/POCLAIN CRAWLER EXCAVATOR (S/N 9501 & AFTER) | 90BCL | 1985 – 1989 |
| POCLAIN CRAWLER EXCAVATOR | 90CL | 1983 |
| CRAWLER DOZER TIER 3 | D75B | 2009 – 2012 |
| POCLAIN CRAWLER EXCAVATOR | LC80 | 1966 – 1977 |
| POCLAIN CRAWLER EXCAVATOR | LC80M | 1969 – 1977 |
| POCLAIN CRAWLER EXCAVATOR (NORTH AMERICA) | TC45 | 1962 – 1971 |