Graco 102040 Lock Nut
4/5
(1 review)
$0.60
In Stock
The Graco 102040 Lock Nut is an OEM hex nut designed to secure parts on sprayer frames, pumps, and brackets, preventing loosening under vibration. Ideal for maintaining long-term stability and safety in Graco spray systems.
- OEM Graco quality for precise fit
- Resists vibration and loosening
- Used in multiple Graco sprayers and stripers
- Durable construction for heavy-duty use
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Product Overview – Graco 102040 Lock Nut (OEM)
Compatible Machines
This OEM Graco 102040 Lock Nut appears across many Graco sprayers and line-striping systems. Verified examples include:
- Magnum X5 — Series B, C, D
- Pro Plus A30 — Model 16E664
- Portable Hydra Sprayer — Model 224-617
- Portable Hydra Sprayer — Model 231-157
- RoadLazer Line Striper Compressors — 231571 (1-pump), 231572 (2-pump)
- Line Driver — 231-151 (4.0 HP), 231-152 (5.5 HP)
- Airless Sprayer — 232735
Note: This fastener is used in numerous assemblies (pump brackets, guards, manifolds, frames). If your model isn’t listed above, check its parts diagram—this nut shows up on many variants.
Key Details
| Part Number | 102040 |
|---|---|
| Part Type | Nut, Lock (Hex) — OEM Graco |
| Typical Use | Prevents loosening under vibration; secures threaded joints in sprayer frames, pump/motor brackets, manifolds, and guards. |
| Weight (approx.) | 0.01 lb (each) |
| UPC (common listing) | 633955382909 |
Why Choose Genuine Graco
- Perfect fit and thread tolerance for Graco assemblies
- Vibration resistance to help maintain clamp load
- Durability under high-duty jobsite use
How to Verify Fit
- Open your model’s parts diagram and search for 102040.
- Match the sub-assembly (e.g., pump bracket, frame, guard) where the nut is called out.
- Confirm quantity needed—many diagrams use multiple 102040 nuts.
Frequently Asked Questions
Yes. It’s an authentic OEM Graco lock hex nut designed for Graco sprayers and line-striping systems.
It is listed for Magnum X5 Series B, C, and D. For other Magnum models, check their specific parts diagrams to confirm 102040 is called out.
Common callouts include pump/motor brackets, manifolds, guards, and frame fastener points—locations subject to vibration where a lock nut is preferred.
Look up your sprayer’s manual/diagram, search for part 102040, and verify the assembly and quantity. If needed, contact support with your model and serial.
A lock nut generally provides resistance to loosening already. Follow your model’s service manual; apply threadlocker only if specified for that fastener location.
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Paul T.
Needed a replacement 102040 Lock Nut, part number 102040, and it matched the original spec exactly, down to the part number. Good value for a genuine Graco part.
