Call or WhatsApp us on 0345 873 0263 

What Do Paint Spray Gun Tip Sizes Mean?

Choosing the right spray tip size is key to achieving the perfect spray pattern and finish. Each spray tip is labelled with a three-digit number (like 515, 313, etc.), which tells you two important things: the width of the spray fan and the size of the orifice (opening) that the paint flows through.


Breaking it down:

The first digit (e.g. the "5" in 515) indicates half the width of the spray fan when the gun is held 12 inches from the surface.

  • So, a "5" = 10-inch spray width, ideal for covering large, flat areas quickly.

The last two digits (e.g. the "15" in 515) refer to the orifice size in thousandths of an inch.

  • "15" means the tip opening is 0.015 inches, suitable for spraying medium-viscosity coatings like emulsion or latex paints.

Example: A 515 tip creates a 10-inch fan and handles medium-thickness materials-making it a great general-purpose choice for walls, ceilings, and fences.


How Do I Choose the Right Tip Size for My Project?

The best tip size depends on two main factors: the type of paint you're using and the surface you're spraying.

  • Thinner materials (like stains, lacquers, and clear finishes): Use smaller tips such as 209 or 311.

These create narrower spray patterns for detailed work and light coats.


  • Thicker materials (like primers, latex, or masonry paints): Choose larger tips like 517, 619, or 621.

These allow a higher flow rate to handle dense coatings and large surfaces.


Tip Selection Guidelines:

  • Narrow spray patterns (2"-6") = better for trim, edges, and detail work.
  • Wider spray patterns (8"-12") = ideal for walls, fences, ceilings, and exteriors.

Always check the paint manufacturer's advice for compatible tip sizes based on viscosity.


Using the correct tip ensures smooth coverage, minimal overspray, and professional-looking results. Ready to get started? Browse our full range of spray tips to find the perfect match for your project.



ra