Sealing Washer
| Machine | Model | Years / S/N |
|---|---|---|
| Loader | 420CT | — |
| Loader | 450CT | — |
| Skid Steer | 435 | — |
| Skid Steer | 465 | — |
| Skid Steer | 450 | — |
| Skid Steer | 445 | — |
| Loader | 445CT | — |
| Skid Steer | 440 | — |
| Loader | 440CT | — |
| Skid Steer | 430 | — |
The 103777A1 sealing washer is a genuine OEM CASE Construction fastener component, available from Southeastern Equipment Company to provide a leak-free connection at threaded fittings.
Compatible equipment
This part fits Loader; Skid Steer including models 40XT, 410, 420, 420CT, 430, 435, 440, 440CT, 445, 445CT, 450, 450CT, 465, 70XT.
Frequently asked questions
What is the part number?
The manufacturer part number is 103777A1.
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
- 103777A1
- Internal SKU
- IC:103777A1
- Brand
- CASE CONSTRUCTION
- Condition
- OEM, new
- Category
- Bolts And Screws
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 22 fitments
| Machine | Model | Years / S/N |
|---|---|---|
| Loader | 420CT | — |
| Loader | 450CT | — |
| Skid Steer | 435 | — |
| Skid Steer | 465 | — |
| Skid Steer | 450 | — |
| Skid Steer | 445 | — |
| Loader | 445CT | — |
| Skid Steer | 440 | — |
| Loader | 440CT | — |
| Skid Steer | 430 | — |
| Skid Steer | 420 | — |
| Skid Steer | 410 | — |
| Skid Steer | 40XT | — |
| Skid Steer | 70XT | — |
| Skid Steer | 90XT | — |
| Skid Steer | 60XT | — |
| Skid Steer | 85XT | — |
| Skid Steer | 95XT | — |
| Skid Steer | 75XT | — |
| Skid Steer | 1825B | — |
| Skid Steer | 1840 | — |
| Skid Steer | 1845C | — |