Overview & Key Uses
The Graco 104938 O-Ring Packing is a small but essential seal used in Graco spray equipment to prevent fluid leaks. It commonly seals the gun swivel to the handle area of select Graco spray guns and may also be used on certain suction / inlet tube joints on compatible sprayers.
If your spray gun or suction assembly calls for part 104938, this OEM O-ring packing restores a tight, leak-free connection.
Compatible Machines
Models where this 104938 O-Ring is commonly specified (gun handle swivel seal or inlet/suction joint):
- Graco Contractor FTX-E Airless Spray Gun (swivel-to-handle seal)
- Graco Ultra Max 695 (select assemblies)
- Graco 495 ST (select assemblies)
- Graco 395 ST (lo-boy suction tube use on some builds)
- Graco 290 Easy (select assemblies)
- LineLazer 3000 / 3400 and similar stripers* (listed by some suppliers as #113 inlet hose O-ring equivalent)
Why Choose This O-Ring
- Leak prevention: Restores a reliable seal at high-pressure connection points.
- OEM fit: Genuine-style Graco 104938 sizing for correct compression and seating.
- Quick fix: Low-cost part that solves drips or air ingress at the gun handle swivel or inlet joint.
- Protects performance: Maintains prime, pressure, and spray pattern consistency.
Typical Installation Location
- Gun handle swivel seal: Seats between the swivel/retainer and the gun handle on certain Graco spray guns (e.g., Contractor FTX-E).
- Inlet / suction tube joint: Used on some Graco airless sprayers to seal the suction assembly connection.
Specs
| Part Number | 104938 |
| Type | O-Ring Packing (seal) |
| Application | Gun swivel-to-handle seal; select inlet/suction tube seals on compatible machines |
| Compatibility | See Compatible Machines list; always verify with the parts manual for your exact model |
Fit & Install Tips
- Clean mating surfaces and remove the old packing completely.
- Lightly lubricate the new O-ring with a compatible fluid to avoid pinching.
- Reassemble per your gun/sprayer manual; tighten to the recommended torque only.
- Pressure test at low pressure first, then bring the unit up to operating pressure and check for leaks.
Frequently Asked Questions
Check your sprayer or gun’s parts diagram/BOM. If the diagram lists 104938 at the swivel-to-handle joint or inlet/suction joint, it’s the correct seal for your unit.
Yes—if the leak originates at the swivel-to-handle interface on a model that specifies 104938, replacing the worn packing typically restores a proper seal and stops drips/air ingress.
Some suppliers cross-reference 104938 to “#113” for certain LineLazer style units. Always verify against your lineup’s official parts list before ordering.
Typically no. A clean seat and light lubrication are sufficient. Follow the procedure in your gun/sprayer manual; avoid adding sealants that may degrade the O-ring.
Many Graco spray guns and sprayers share seal sizes. If your manual calls out 104938, it will fit even if not listed here. Share your model number and we can confirm fitment.
