Graco 164381 Piston Stud
$182.00
In Stock
The Graco 164381 Piston Stud is a genuine OEM fastener used in select Graco pump/fluid sections. Verify fitment with your model’s parts diagram before ordering.
- Part No.: 164381
- Role: Secures piston/rod assembly for alignment & seal life
- Status: Model-specific compatibility not confirmed — verify
- Sold individually; follow OEM torque specs
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Precision Pump Hardware – Installation & Fitment Notes
The Graco 164381 Piston Stud (also referenced as Stud Piston) is an OEM fastener used inside select Graco fluid/pump assemblies. Confirm fitment against your machine’s parts diagram before ordering.
Compatible Machines
Overview
The Graco 164381 Piston Stud is a genuine OEM component that secures elements of the piston/rod assembly within applicable Graco pump sections. Using the correct stud helps maintain alignment, sealing integrity, and long-term pump performance.
Key Details
| Part Number | 164381 |
|---|---|
| Part Name | Piston Stud / Stud Piston |
| Type | Pump / Fluid-Section Fastener (OEM) |
| Typical Location | Piston/Rod assembly within the pump (see your model’s exploded diagram) |
| Fitment Status | Model-specific list not confirmed — verify using OEM parts manual |
| Packaging | Sold individually |
| Notes | Match to pump revision/kit; torque per OEM specification |
Why This Part Matters
- Maintains piston alignment for consistent pressure and spray pattern
- Supports seal life by keeping the assembly correctly clamped
- OEM quality helps ensure durability and reliable operation
How to Confirm Fit
- Locate your sprayer’s OEM parts manual or exploded pump diagram.
- Find the piston/rod (fluid section) callout and confirm 164381 is listed.
- Check pump revision/kit number; some models changed hardware across revisions.
- If unsure, share your exact model and serial to verify before purchase.
Frequently Asked Questions
Fitment depends on your pump revision and model. Check your OEM parts list for the piston/rod assembly and confirm that 164381 is specified for your exact machine and revision.
Always follow the OEM torque spec for the piston/rod fasteners and install in a clean, debris-free environment. Inspect mating threads and replace related seals/gaskets if your manual calls for it during reassembly.
Substitutions are not advised unless explicitly cross-referenced by Graco. Even minor differences in length, thread, or material can impact pump performance and seal life.
Some models bundle the Piston Stud within a pump repair kit. If your diagram references a kit, order that kit so you receive all required matched components and seals for the repair.
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