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Graco 15B163 Needle Nut

The Graco 15B163 Needle Nut secures the fluid needle in Graco spray guns, ensuring precise fluid control and preventing leaks.

  • OEM-grade needle locking nut for spray guns
  • Maintains proper needle alignment
  • Durable metal construction for long service life
  • Compatible with Graco Models 248091, 248903, and similar texture guns

$14.52
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Graco 15B163 Needle Nut – Product Details & Compatibility

Compatible Machines

The Graco 15B163 Needle Nut is commonly used in Graco texture spray guns and fluid control assemblies.

  • Graco TexSpray Gun Model 248091 (non-bleeder) 
  • Graco Spray Gun Model 248903 (non-bleeder)
  • Other Graco models that include a fluid needle assembly in their parts list (shown in Graco parts manual) 

Product Overview

The Graco 15B163 Needle Nut is a critical OEM component that secures the fluid needle within the spray gun’s needle-guide assembly. It ensures precise control of fluid flow and maintains proper needle alignment during operation.

Key Features

  • OEM-grade nut for securing the fluid needle
  • Provides stable needle alignment
  • Helps prevent leakage around the needle stem
  • Durable metal design for long service life

Technical Specifications

Part Number 15B163
Description Needle lock nut / Fluid needle securing nut
Application Holds the fluid needle in the guide of Graco spray guns
Used In Graco texture and spray guns (e.g. Models 248091, 248903) 

Usage Notes

  • Tighten the nut with the correct torque to avoid damaging the needle or guide.
  • When replacing, inspect the fluid needle and guide for wear or damage.
  • Use thread sealant only if specified by Graco’s maintenance instructions.
  • During reassembly, ensure the needle moves freely without binding.

Frequently Asked Questions

It secures the fluid needle inside the gun’s guide, helping maintain accurate alignment and preventing leaks.

If you observe fluid leaking around the needle, or if the nut is damaged or worn, it is advisable to replace it to restore tight sealing and performance.

While alternative nuts may fit, using the OEM Graco 15B163 ensures the correct dimensions, thread engagement, and durability needed for optimal needle operation.

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