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Graco 168685 Spring Adjusting Screw

OEM Graco 168685 Spring Adjusting Screw for trigger/valve spring tension control. Helps ensure proper shut-off and consistent trigger performance.

  • Precision-adjusted spring preload
  • Maintains safe spray shut-off
  • Fits Graco Pistol-Grip Mastic Flo-Gun models

$152.32
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Graco 168685 Spring Adjusting Screw

Compatible Machines

This OEM Graco 168685 Spring Adjusting Screw fits the following spray gun models:

  • Graco Pistol-Grip Mastic Flo-Gun Model 224990 (Series A, With Diffuser)
  • Graco Pistol-Grip Mastic Flo-Gun Model 224991 (Series A, Without Diffuser)
  • Graco Pistol-Grip Mastic Flo-Gun Model 289670 (Variant)
  • Graco Pistol-Grip Mastic Flo-Gun Model 289671 (Variant)

Product Overview

The Graco 168685 Spring Adjusting Screw plays a key role in maintaining precise trigger and valve control within compatible Graco spray guns. It allows fine adjustment of internal spring tension, helping ensure proper shut-off performance, consistent spray control, and comfortable trigger responsiveness.

Key Features

  • OEM replacement part for specific Graco spray gun models
  • Adjusts spring preload to support proper gun shut-off and trigger feel
  • Critical for maintaining spray safety and performance
  • Precision-machined for durability and reliability

Technical Details

Part Number 168685
Component Type Spring Adjusting Screw
Application Trigger / Valve Assembly Adjustment
Material Precision-machined steel

When to Replace

  • Irregular trigger tension or gun fails to shut off properly
  • Visible wear, stripped threads, or corrosion on adjustment screw
  • Trigger performance varies between spray cycles

Installation & Adjustment Guidance

  • Always follow proper pressure relief procedures before servicing the spray gun
  • Turn the screw clockwise to increase spring tension
  • Turn counter-clockwise to reduce trigger preload
  • Test trigger shut-off several times after adjusting to ensure consistent operation

Frequently Asked Questions

It adjusts internal spring pressure in the trigger valve assembly, ensuring proper shut-off and consistent trigger feel during spraying.

Only the models listed under Compatible Machines are verified to use this part. Check your equipment manual if using it on a different spray gun.

Yes, this is a genuine OEM replacement component designed to maintain original trigger performance and safety.

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