Square Nut

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.

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.

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.