OEM O-Ring · Case Construction
86629543$1.50
In stock
Case Construction
OEM
Part No. 12578015
Nut
389 verified fitments
Select your machine to check fit
Ships nationwideUPS, USPS & freight
30-day returnsNew, unused parts
OEM guaranteedDirect from manufacturer
| Machine | Model | Years / S/N |
|---|---|---|
| Tractor | MAGNUM 405 | 2025 |
| Tractor | MAGNUM 280 | — |
| Tractor | MAGNUM 250 | — |
| Tractor | MAGNUM 265 | 2025 |
| Tractor | MAGNUM 310 | — |
| Tractor | MAGNUM 340 | — |
| Tractor | MAGNUM 265 | — |
| Tractor | MAGNUM 400 | — |
| Tractor | MAGNUM 380 | — |
| Tractor | MAGNUM 325 | 2025 |
Enhance your heavy equipment performance with the Case Construction Nut #12578015. Designed for durability and precision, this essential component ensures secure connections and optimal functionality in your machinery, keeping your operations running smoothly and efficiently.
Frequently asked questions
What is the part number?
The manufacturer part number is 12578015.
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.
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
- 12578015
- Brand
- Case Construction
- Condition
- OEM, new
- Category
- Case Construction
- Weight
- 0.01 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 389 fitments
| Machine | Model | Years / S/N |
|---|---|---|
| Tractor | MAGNUM 405 | 2025 |
| Tractor | MAGNUM 280 | — |
| Tractor | MAGNUM 250 | — |
| Tractor | MAGNUM 265 | 2025 |
| Tractor | MAGNUM 310 | — |
| Tractor | MAGNUM 340 | — |
| Tractor | MAGNUM 265 | — |
| Tractor | MAGNUM 400 | — |
| Tractor | MAGNUM 380 | — |
| Tractor | MAGNUM 325 | 2025 |
| Tractor | MAGNUM 295 | 2025 |
| Tractor | VESTRUM 100 | 2021 |
| Tractor | MAGNUM 385 | — |
| Tractor | MAGNUM 355 | 2025 |
| Tractor | VESTRUM 130 | 2021 |
| Tractor | MAGNUM 385 | 2025 |
| Tractor | QUANTUM 110N | — |
| Tractor | FARMALL 110CL | — |
| Tractor | FARMALL 100CL | — |
| Tractor | FARMALL 100N | — |
| Tractor | FARMALL 110V | — |
| Tractor | FARMALL 110N | — |
| Tractor | FARMALL 100V | — |
| Tractor | FARMALL 80CL | — |
| Tractor | FARMALL 120V | — |
| Tractor | FARMALL 120N | — |
| Tractor | FARMALL 120CL | — |
| Tractor | FARMALL 90CL | — |
| Tractor | FARMALL 80V | — |
| Tractor | FARMALL 80N | — |
| Tractor | FARMALL 90N | — |
| Tractor | FARMALL 90V | — |
| Tractor | QUANTUM 100CL | — |
| Tractor | QUANTUM 110F | — |
| Tractor | QUANTUM 100V | — |
| Tractor | QUANTUM 100N | — |
| Tractor | QUANTUM 100F | — |
| Tractor | QUANTUM 80F | — |
| Tractor | QUANTUM 80CL | — |
| Tractor | QUANTUM 120V | — |
| Tractor | QUANTUM 120N | — |
| Tractor | QUANTUM 120F | — |
| Tractor | QUANTUM 120CL | — |
| Tractor | QUANTUM 110V | — |
| Tractor | QUANTUM 90V | — |
| Tractor | QUANTUM 90N | — |
| Tractor | QUANTUM 90F | — |
| Tractor | QUANTUM 90CL | — |
| Tractor | QUANTUM 80V | — |
| Tractor | QUANTUM 80N | — |
| Tractor | QUANTUM 110CL | — |
| Tractor | FARMALL 90C | 2024 |
| Tractor | FARMALL 100A | — |
| Tractor | FARMALL 110A | — |
| Tractor | FARMALL 90A | — |
| Tractor | FARMALL 100C | 2025 |
| Tractor | FARMALL 120C | 2024 |
| Tractor | FARMALL 110C | 2024 |
| Tractor | FARMALL 100C | 2024 |
| Tractor | FARMALL 120C | 2025 |
| Tractor | FARMALL 110C | 2025 |
| Tractor | FARMALL 120A | 2025 |
| Tractor | FARMALL 90A | 2025 |
| Tractor | FARMALL 110A | 2025 |
| Tractor | FARMALL 100A | 2025 |
| Combine | AXIAL-FLOW 7260 | 2027 |
| Combine | 7250 | 2023 |
| Combine | 8250 | 2023 |
| Combine | 5160 | 2026 |
| Combine | AF10 A5 | — |
| Combine | AF10 | — |
| Combine | AF10 E5 | — |
| Combine | AF11 A5 | — |
| Combine | AF9 | — |
| Combine | AF9 E5 | — |
| Combine | AF9 A5 | — |
| Combine | AF11 | — |
| Combine | 5160 | 2024 |
| Combine | 6160 | 2024 |
| Combine | 7160 | 2024 |
| Combine | AF10 A5 MY26 | — |
| Combine | 8260 AXIAL-FLOW | 2025 |
| Combine | 6160 | 2026 |
| Combine | AF9 MY26 | — |
| Combine | AF9 E5 MY26 | — |
| Combine | AF9 A5 MY26 | — |
| Combine | AF11 A5 MY26 | — |
| Combine | AF10 MY26 | — |
| Combine | AF10 E5 MY26 | — |
| Combine | 7160 | 2026 |
| Combine | AXIAL-FLOW 8260 | 2026 |
| Combine | AXIAL-FLOW 7260 | 2026 |
| Combine | AXIAL-FLOW 9260 | 2026, 2027 |
| Combine | AXIAL-FLOW 8260 | 2027 |
| Tractor | WORKMASTER 100 PLUS | 2025 |
| Tractor | T8.385 | 2025 |
| Tractor | T8.415 | 2025 |
| Tractor | POWERSTAR 100 | 2025 |
| Tractor | T8.355 | 2025 |
| Tractor | T8.325 | 2025 |
| Tractor | T8.440 | 2025 |
| Tractor | T5.110 | — |
| Tractor | T5.100S | — |
| Tractor | T5.100 | — |
| Tractor | T5.110S | — |
| Tractor | T5.120 | — |
| Tractor | T5.90S | — |
| Tractor | T8.320 | — |
| Tractor | T8.380 | — |
| Tractor | T8.350 | — |
| Tractor | T8.410 | — |
| Tractor | T8.435 | — |
| Tractor | POWERSTAR 120 | 2025 |
| Tractor | POWERSTAR 110 | 2025 |
| Tractor | POWERSTAR 90 | 2024 |
| Tractor | POWERSTAR 120 | 2024 |
| Tractor | POWERSTAR 110 | 2024 |
| Tractor | POWERSTAR 100 | 2024 |
| Tractor | WORKMASTER 90 PLUS | 2025 |
| Tractor | WORKMASTER 120 PLUS | 2025 |
| Tractor | WORKMASTER 110 PLUS | 2025 |
| Tractor | T4.110F | — |
| Tractor | T4.100F | — |
| Tractor | T4.100LP | — |
| Tractor | T4.100V | — |
| Tractor | T4.100N | — |
| Tractor | T4.110N | — |
| Tractor | T4.110LP | — |
| Tractor | T4.120LP | — |
| Tractor | T4.120F | — |
| Tractor | T4.110V | — |
| Tractor | T4.80F | — |
| Tractor | T4.120V | — |
| Tractor | T4.120N | — |
| Tractor | T4.80N | — |
| Tractor | T4.80LP | — |
| Tractor | T4.90F | — |
| Tractor | T4.80V | — |
| Tractor | T4.90V | — |
| Tractor | T4.90N | — |
| Tractor | T4.90LP | — |
| Harvester | FR920 A5 | — |
| Harvester | FR550 A5 | — |
| Harvester | FR500 I3 | — |
| Harvester | FR480 E5 | — |
| Harvester | FR480 A5 | — |
| Harvester | FR450 I3 | — |
| Harvester | FR550 K4 | — |
| Harvester | FR480 K4 | — |
| Harvester | FR780 E5 | — |
| Harvester | FR780 E2 | — |
| Harvester | FR780 A5 | — |
| Harvester | FR650 E5 | — |
| Harvester | FR650 E2 | — |
| Harvester | FR650 A5 | — |
| Harvester | FR550 E5 | — |
| Harvester | FR920 E5 | — |
| Combine | CX8.90 TRA5 | 2026 |
| Combine | CX7.80 E5 | 2026 |
| Combine | CX8.80 A5 | 2026 |
| Combine | CX8.70 E5 | 2026 |
| Combine | CX7.90 TRE5 | 2026 |
| Combine | CX7.90 E5 | 2026 |
| Combine | CX8.90 E5 | 2026 |
| Combine | CX8.90 A5 | 2026 |
| Combine | CX8.80 TR3 | 2026 |
| Combine | CX8.80 TRE5 | 2026 |
| Combine | CX8.80 TRA5 | 2026 |
| Combine | CX8.80 I3 | 2026 |
| Combine | CX8.80 E5 | 2026 |
| Combine | CX8.90 TRE5 | 2026 |
| Combine | CR8.90 CHINA IV 14 5 AGG SHAKE | 2025 |
| Combine | CR8.90 A5 AGGR SHAKE | 2025 |
| Combine | CR10.90 A5 OPTICLEAN | — |
| Combine | CR7.80 A5 AGGR SHAKE | — |
| Combine | CR7.90 A5 AGGR SHAKE | — |
| Combine | CR8.90 TRA5 OPTICLEAN | — |
| Combine | CR8.90 TRA5 AGGR SHAKE | — |
| Combine | CR8.90 A5 OPTICLEAN | — |
| Combine | CR9.90 TRA5 AGGR SHAKE | — |
| Combine | CR9.90 A5 OPTICLEAN | — |
| Combine | CR9.90 TRA5 OPTICLEAN | — |
| Combine | CR10.90 TRA5 OPTICLEAN | 2025 |
| Combine | CR10.90 E2 | 2025 |
| Combine | CR9.90 E0 | 2025 |
| Combine | CR7.90 E2 | 2025 |
| Combine | CR7.90 A5 AGGR SHAKE | 2025 |
| Combine | CR7.80 E5 | 2025 |
| Combine | CR7.80 E2 | 2025 |
| Combine | CR7.80 A5 AGGR SHAKE | 2025 |
| Combine | CR10.90 TRE5 | 2025 |
| Combine | CR10.90 TRE2 | 2025 |
| Combine | CR8.90 E0 12 5 | 2025 |
| Combine | CR8.90 A5 OPTICLEAN | 2025 |
| Combine | CR8.80 TRE5 | 2025 |
| Combine | CR8.80 E5 | 2025 |
| Combine | CR7.90 TRE5 | 2025 |
| Combine | CR7.90 TRE2 | 2025 |
| Combine | CR7.90 E5 | 2025 |
| Combine | CR8.90 TRA5 OPTICLEAN | 2025 |
| Combine | CR8.90 L0 | 2025 |
| Combine | CR8.90 L0 12 5 | 2025 |
| Combine | CR8.90 LTR0 | 2025 |
| Combine | CR8.90 E5 | 2025 |
| Combine | CR8.90 E5 12 5 | 2025 |
| Combine | CR9.90 E0 12 5 | 2025 |
| Combine | CR9.90 A5 OPTICLEAN | 2025 |
| Combine | CR9.90 A5 AGGR SHAKE | 2025 |
| Combine | CR8.90 TRL0 12 5 | 2025 |
| Combine | CR8.90 TRE5 | 2025 |
| Combine | CR8.90 TRE5 12 5 | 2025 |
| Combine | CR8.90 TRE0 12 5 | 2025 |
| Combine | CR9.90 TRE0 | 2025 |
| Combine | CR9.90 TRE0 12 5 | 2025 |
| Combine | CR9.90 TRA5 OPTICLEAN | 2025 |
| Combine | CR9.90 TRA5 AGGR SHAKE | 2025 |
| Combine | CR9.90 E5 | 2025 |
| Combine | CR9.90 E5 12 5 | 2025 |
| Combine | CR9.90 TRE5 12 5 | 2025 |
| Combine | CR9.90 TRE5 | 2025 |
| Combine | CR10 E5 | — |
| Combine | CR10 A5 | — |
| Combine | CR9.90 A5 AGGR SHAKE | — |
| Combine | CR11 E5 | — |
| Combine | CR11 A5 | — |
| Combine | CR10 | — |
| Combine | CR10 TRE5 | — |
| Combine | CR10 TRA5 | — |
| Combine | CR10 TR | — |
| Combine | CR11 TR | — |
| Combine | CR11 | — |
| Combine | CR11 TRE5 | — |
| Combine | CR11 TRA5 | — |
| Combine | CR8.90 TR CHINA IV 14 5 AGG SH | 2025 |
| Backhoe | 580SV | 2025 |
| Backhoe | 695SV | 2022 |
| Backhoe | 580SV | 2022, 2021, 2024 |
| Backhoe | 695SV | 2025 |
| Backhoe | B95D | 2025 |
| Backhoe | B110D | 2025 |
| Backhoe | B95D | 2021 |
| Backhoe | B110D | 2021 |
| Tractor | MAGNUM 4002 | 2025 |
| Combine | 7260 AXIAL-FLOW | 2025 |
| Combine | 9260 AXIAL-FLOW | 2025 |
| Combine | CR10.90 A5 OPTICLEAN | 2025 |
| Combine | CR10.90 E5 | 2025 |
| Combine | CR8.90 TRA5 AGGR SHAKE | 2025 |
| Tractor | VERSUM 130 | — |
| Tractor | VERSUM 120 | — |
| Tractor | VERSUM 110 | — |
| Tractor | VERSUM 100 | — |
| Tractor | VESTRUM 120 | 2021 |
| Tractor | VESTRUM 110 | 2021 |
| Tractor | T5.120 | 2021 |
| Tractor | T5.110 | 2021 |
| Combine | 7250 | 2024 |
| Combine | 8250 | 2024 |
| Combine | 9260 AXIAL-FLOW | 2024 |
| Combine | 8260 AXIAL-FLOW | 2024 |
| Combine | 7260 AXIAL-FLOW | 2024 |
| Combine | 9250 | 2024 |
| Combine | CR10.90 TRA5 OPTICLEAN | — |
| Combine | CR8.90 A5 AGGR SHAKE | — |
| Combine | 6150 | — |
| Combine | 5150 | — |
| Combine | 7150 | — |
| Combine | 9250 | 2023 |
| Tractor | T5.140 | 2021 |
| Tractor | T5.130 | 2021 |
| Combine | CR10.90 .A5 | — |
| Combine | CR10.90 .TRA5 | — |
| Combine | CR7.90 .A5 AGGR SHAKE | — |
| Combine | CR7.80 .A5 AGGR SHAKE | — |
| Combine | CR8.90 .TRA5 | — |
| Combine | CR8.90 .A5 AGGR SHAKE | — |
| Combine | CR8.90 .A5 | — |
| Combine | CR9.90 .TRA5 | — |
| Combine | CR9.90 .A5 AGGR SHAKE | — |
| Combine | CR9.90 .A5 | — |
| Combine | 7250 | 2022 |
| Combine | 9250 | 2022 |
| Tractor | VESTRUM 130 | — |
| Combine | 8250 | 2022 |
| Combine | 6150 | 2022 |
| Combine | 7150 | 2022 |
| Tractor | T4.110F | 2018 |
| Tractor | T4.90F | 2018 |
| Tractor | T4.100LP | 2018 |
| Tractor | T4.110LP | 2018 |
| Tractor | T4.100F | 2018 |
| Tractor | T4.90LP | 2018 |
| Combine | CR8.90. TRA5 AGGR SHAKE | — |
| Combine | CR9.90. TRA5 | — |
| Tractor | T4.80F | 2018 |
| Tractor | T4.80LP | 2018 |
| Combine | 9250 | 2021 |
| Tractor | FARMALL 100CL | 2018 |
| Tractor | FARMALL 80CL | 2018 |
| Combine | 7250 | 2021 |
| Combine | 8250 | 2021 |
| Combine | CR8.90. A5 AGGR SHAKE | — |
| Tractor | VESTRUM 100 | — |
| Tractor | T5.130 | — |
| Tractor | T5.140 | — |
| Combine | CR7.90. A5 AGGR SHAKE | — |
| Combine | CR10.90. TRA5 | — |
| Combine | CR10.90. A5 | — |
| Combine | CR8.90. A5 | — |
| Combine | CR9.90. A5 AGGR SHAKE | — |
| Combine | CR7.80. A5 AGGR SHAKE | — |
| Combine | CR9.90. A5 | — |
| Tractor | FARMALL 110CL | 2018 |
| Combine | CR8.90. TRA5 | — |
| Tractor | FARMALL 90CL | 2018 |
| Combine | CR10.90 TRA5. | — |
| Combine | CR10.90 TRA 4B | — |
| Combine | 7250 | 2020 |
| Combine | 8250 | 2020 |
| Combine | 9250 | 2020 |
| Combine | CR9.90 TRA5. | — |
| Combine | CR8.90 TRA5. | — |
| Combine | CR8.90 A5. | — |
| Combine | CR9.90 A5. | — |
| Combine | CR10.90 A5. | — |
| Skid Steer | SR160 | — |
| Combine | 9250 | 2019 |
| Combine | 7250 | 2019 |
| Combine | 8250 | 2019 |
| Combine | CR8.90 A4B | — |
| Combine | CR9.90 A4B | — |
| Combine | CR10.90 A 4B | — |
| Combine | CR8.90 TRA4B | — |
| Combine | CR7.90 MY18 | — |
| Combine | CR9.90 TRA4B | — |
| Combine | CR6.90 MY18 | — |
| Tractor | FARMALL 105C | — |
| Tractor | FARMALL 85C | — |
| Tractor | FARMALL 95C | — |
| Combine | 7240 | 2018 |
| Combine | 8240 | 2018 |
| Combine | 9240 | 2018 |
| Tractor | FARMALL 115C | — |
| Combine | CR10.90 TRA4B | — |
| Combine | CR9.90 A4A | — |
| Combine | CR10.90 A4B | — |
| Combine | CR7.90 A4A | — |
| Combine | CR9.90 TRA4A | — |
| Combine | 7240 | — |
| Combine | 8240 | — |
| Combine | 9240 | — |
| Tractor | T5.95 | — |
| Tractor | T5.105 | — |
| Tractor | T5.115 | — |
| Tractor | FARMALL 105U | — |
| Tractor | FARMALL 115U | — |
| Tractor | T4.105 | — |
| Tractor | T4.95 | — |
| Tractor | T4.115 | — |
| Tractor | T4.85 | — |
| Tractor | FARMALL 75C | — |
| Combine | 9230 | — |
| Combine | 7230 | — |
| Tractor | T4.75 | — |
| Combine | 7130 | — |
| Combine | 8230 | — |
| Combine | 7120 | — |
| Combine | 8120 | — |
| Combine | 9120 | — |
| Combine | 8010 | — |
| Combine | 7010 | — |
| Combine | 9010 | — |
| Tractor | TN70F | — |
| Tractor | TN95F | — |
| Tractor | TN80F | — |
| Tractor | TN90F | — |
| Tractor | TN65F | — |
| Tractor | TN75F | — |
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