Graco 15E813 Jam Nut
5/5
(1 review)
$5.25
In Stock
Graco 15E813 Jam Nut is a small yet essential part that locks the siphon hose securely to the fluid pump, preventing leaks and ensuring reliable operation across multiple Graco sprayers.
- Replaces older part number 15B434
- Used in FinishPro, ST Max, Ultra, Ultra Max II, and GMAX models
- Durable and easy to install for long-term performance
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
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Overview & Key Details for Graco 15E813 Jam Nut
Graco 15E813 Jam Nut secures the siphon (suction) hose connection to the sprayer’s fluid pump. It replaces/was formerly referenced as 15B434 on some diagrams. Always confirm against your unit’s parts list before ordering.
Compatible Machines
- FinishPro 290 (256842)
- FinishPro 390 (249690)
- FinishPro 395 (249691)
- 190 ES (261825)
- 290 ES (261830)
- ST Max 490 (253013)
- ST Max 495 (249978)
- ST Max 595 (249930)
- GMAX 3400 Hi-Boy (248664)
- GMAX 3400 Lo-Boy (248666)
- Ultra 395 (233962)
- Ultra 495 (233968)
- Ultra 595 (234435)
- Ultra Max II 490 (249914)
- Ultra Max II 495 (249917)
- Ultra Max II 595 (249919)
- RentalPro 210 (262906)
- Electric Airless 190LTS (257075)
- GMAX 340 (per Graco/retailer listings)
Specifications
| Part Number | 15E813 |
|---|---|
| Also Known As | 15B434 (former reference on some diagrams) |
| Function | Locks/retains the siphon (suction) hose connection to the fluid pump inlet. |
| Usage | Common across multiple FinishPro, ST Max, Ultra, Ultra Max II, GMAX and Rental series units. |
| UPC | 633955088719 |
| What’s in the Box | 1 × Graco 15E813 Jam Nut |
| Fitment Tip | Verify against your sprayer’s parts list or diagram before purchase. |
Frequently Asked Questions
It secures the suction/siphon hose at the pump inlet to prevent loosening or leaks during operation.
Yes - some diagrams reference the earlier number 15B434; the current replacement jam nut is 15E813.
Match your exact model/variant (e.g., “Ultra Max II 495 Hi-Boy 249917”) against its parts list. This nut is widely used across the models listed above.
Hand-start threads to avoid cross-threading, snug the jam nut to secure the hose, and check for leaks after priming. Do not overtighten; consult your unit’s manual for torque guidance.
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Janet H.
Needed a replacement 15E813 Jam Nut, part number 15E813, and it solved the issue we were having right away. This is now our go-to for replacement parts.
