Graco 24J603 Finex Air Spray Gravity Feed Side Cup Gun

Graco 24J603 Finex is a precise, conventional gravity-feed side-cup spray gun for fine-finish work. Connects to clean, regulated shop airnot to airless sprayers.

Includes 1.4 mm needle/nozzle/air-cap set
1/4" NPSM air inlet; non-bleeder design
Max inlet pressure 100 psi (7 bar)
Ideal for cabinetry, furniture, fixtures, and touch-up
Use with filtered, dry air; compatible Finex accessories available

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Description

Professional Overview

Compatible Machines / Setups

Graco 24J603 Finex Air Spray Gravity Feed Side-Cup Gun is a stand-alone conventional air spray gun. It does not mount to airless sprayers (e.g., Ultra, GMAX, Mark-series). It connects to any clean, regulated compressed-air setup.

Shop or booth air systems supplying clean, dry, regulated air up to 100 psi (7 bar)
Air lines, filters, and regulators with a 1/4" NPSM air inlet connection
Finishing benches/production lines using conventional (non-HVLP) spray processes
Compatible Finex series accessories (air caps, needle/nozzle kits) sized for the Finex platform

What it is

Graco 24J603 Finex is a light, precise, gravity-feed side-cup conventional spray gun designed for fine-finish work on wood, metal, plastics, and composites. It features a smooth, low-effort trigger, a balanced body, and predictable atomization for consistent surface quality.

Key Features

Conventional (non-HVLP) atomization for crisp, even finishes
Side-cup gravity feed for better visibility and control on detail work
Supplied with a 1.4 mm needle/nozzle/air-cap set (ideal all-round detail size)
1/4" NPSM air inlet; non-bleeder design for reduced air consumption when idle
Rated to 100 psi (7 bar) max inlet pressure
Supports common solventborne & waterborne materials: clears, enamels, urethanes, lacquers, epoxies

Specifications

Part Number	24J603
Gun Type	Conventional (non-HVLP), non-bleeder
Feed Style	Gravity with side-mounted cup
Included Orifice	1.4 mm needle/nozzle/air-cap set
Air Inlet	1/4" NPSM
Max Inlet Pressure	100 psi (7 bar)
Typical Applications	Cabinetry, furniture, auto refinish parts, fixtures, light industrial finishes, prototyping

Setup & Use Tips

Use clean, dry air with filtration (water/oil separators) before the gun regulator.
Start with lower inlet pressure, increase gradually until desired atomization is achieved.
Strain coatings and test on scrap to dial in fan pattern and flow.

Frequently Asked Questions

No. The 24J603 Finex is a compressed-air spray gun with a 1/4" NPSM air inlet. It does not mount to, or replace the gun on, Graco airless units. Use it with a regulated shop air source or spray booth system.

The included 1.4 mm set is a versatile size for clears, enamels, basecoats, light urethanes, and many waterborne finishes. For thicker materials, consider alternative Finex needle/nozzle sizes and adjust viscosity per coating guidance.

A clean, dry, regulated air source capable of up to 100 psi (7 bar), connected via 1/4" NPSM. Use filters/separators and keep hoses short and appropriately sized to minimize pressure drop.

Yes. The Finex platform supports alternative needle/nozzle/air-cap sets. Match size to material viscosity and target finish quality, and always test/adjust pattern and flow after changes.