Nut Spring

Enhance your heavy equipment performance with the Case Construction Nut Spring #131-648. Designed for durability and precision, this essential part ensures optimal functionality in your machinery, keeping your operations running smoothly and efficiently. Perfect for Case equipment maintenance and repairs.

Compatible equipment

This part fits CASE IH AXIAL-FLOW COMBINE, CASE IH COTTON EXPRESS COTTON PICKER, CASE IH AXIAL-FLOW COMBINE (NA), CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001&HAJ300000, CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540, CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000, CASE IH AXIAL-FLOW COMBINE (RU) ASN HAJ300001, CASE IH COTTON EXPRESS COTTON PICKER (AFTER S/N JJC0249500), CASE IH COTTON EXPRESS COTTON PICKER (BEFORE S/N JJC0249499), AXIAL-FLOW COMBINE (NA) ASN HAJ0300001, CASE IH AXIAL-FLOW COMBINE (NA) ASN HAJ300001, COTTON EXPRESS COTTON PICKER, CASE WHEEL LOADER (PRIOR TO S/N JAK0021701) (NORTH AMERICA), CASE WHEEL LOADER (S/N JAK0021701 & AFTER) (NORTH AMERICA), CASE WHEEL LOADER (NORTH AMERICA), AXIAL-FLOW COMBINE, COMBINE - TIER 4, CASE WHEEL LOADER, COMPACT TRACK LOADER, COMPACT TRACK LOADER - NRC, COMPACT TRACK LOADER - TIER 4B, COMPACT TRACK LOADER - TIER 4A, COMPACT TRACK LOADER - TIER 4B-C, COMPACT TRACK LOADER - TIER 3 - ROW, COMPACT TRACK LOADER - TIER 4F - NA, CASE IH COTTON PICKER, SKID STEER ENGINE - N844, SKID STEER LOADER, SKID STEER LOADER - NRC, SKID STEER LOADER - TIER 4B, SKID STEER ENGINE - 844T, SKID STEER ENGINE - N844LT, SKID STEER LOADER - TIER 4A, SKID STEER LOADER - TIER 4B-C, SKID STEER LOADER - TIER 3 - ROW, SKID STEER LOADER - TIER 4F - NA, SKID STEER LOADER TIER 4, CASE WHEEL LOADER (PRIOR TO S/N 17754000), CASE WHEEL LOADER (S/N 17754000 & AFTER) including models 2144, 2155, 2166, 2188, 2344, 2366, 2377, 2388, 2555, 2577, 2588, 420, 420 TIER 3, 621, 621B, 7010, 7120, 721, 721B, 7230, 8010, 8120, 821, 821B, 8230.

Frequently asked questions

What is the part number?

The manufacturer part number is 131-648.

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.